New Technology

One of the most important features for consumers purchasing a new car is engine efficiency. This term describes the percentage of chemical efficiency in gas that is converted to mechanical efficiencies that move the car. The higher the rate of efficiency, the more effectively you’re using the gas put into your car.

 

While today’s vehicles provide better fuel economy than just a few years ago, more than half of the gas you pump into your car goes to waste. That means roughly 60 cents out of every dollar you spend on fuel does nothing to move your vehicle down the road.

 

Internal combustion automobile engines aren’t very efficient, using less than 40% to power the car and a small amount to power engine accessories. The rest is thrown away as “waste heat.” Consider this too: The AAA annual analysis of driving costs reveals that per-mile fuel costs are higher than per-mile maintenance, repair and tire costs combined. So, while you’re spending most of your driving costs on fuel, more than half goes to nothing but hot air.

 

Manufacturers continue to try to lessen the gap in engine efficiency, working on new technologies such as stop-start systems, low RPM operation, turbocharging and more. Consumers, too, can take steps of their own to improve efficiency and save money on fuel.

 

If you’re looking for a new car, consider models that have the highest EPA-estimated fuel economy ratings. You might want to consider a model that uses the stop-start system that shuts down the engine when the car is stopped in traffic. While it takes some getting used to, this system can deliver a gain in efficiency, especially if your commute is low speed, stop-and-go traffic. 

 

Consumers should examine their own driving behavior as well. Moderate acceleration at low RPMs, staying within the speed limit, coasting to stopped traffic, and using cruise control to maintain a safe, legal speed, will all stretch your tank of gas further. “Drive as if you have an egg between your foot and the gas pedal,” advises AAA’s Car Doctor, John Paul. “Going easy on the gas and the brake will maximize your fuel economy.” Also, simple car maintenance — such as inflating tires to their proper level, ensuring you’re using the recommended motor oil, and making sure your gas cap has a proper seal — can also improve your driving efficiency.

The AAA automotive engineering team recently conducted research on halogen headlights — the kind on more than 80% of vehicles on the road today — with surprising results.  Examining the illumination provided at low- and high-beam settings, AAA determined that halogen headlights on the low-beam setting are insufficient when driving at highway speeds on roads with no additional overhead lighting.

 

Simple math bears this out.  At 55 mph, a driver requires about 500 feet of roadway to perceive an obstacle, react to it, and bring the car to a complete and safe stop. Yet halogen lights illuminate only 300 feet on low beams, leaving about 200 feet of dark road where obstacles are unseen — with no time for drivers to react. In fact, most low beams only help you stop in time if you’re driving no faster than 35 mph.

 

Late model vehicles with newer high-intensity discharge (HID) lights illuminate up to 400 feet; and light-emitting diode (LED) lights only illuminate up to 450 feet. But even these newer models are lacking.

 

What can drivers do now? Thankfully, most highways are dotted with lights to make up for the headlight shortfall. If overhead lights are not present, using high beams can improve sight distances by an average of 28%. Drivers should get in a habit of using their vehicle’s high beams, making sure to dim them in the presence of other drivers.

 

AAA continues to research this issue. The automotive engineering group recently studied Adaptive Driving Beam (ADB) headlights, which are currently used in Europe and Canada, but are illegal in the U.S. ADB headlights — also called smart headlights — shine as brightly as traditional lights that have high beams, but come with new technology that prevents glare from shining into oncoming vehicles.

 

Another big problem with headlights is visibility. Pitted, yellow and hazy lights significantly reduce output, and can scatter light instead of focusing it on the roadway. A basic headlight restoration kit — available at auto supply stores — doubles the light intensity and reduces light scattering. For more damaged lights, a AAA Approved Auto Repair facility can do more aggressive restoration or even replace them if necessary.

It may seem like something from a sci-fi movie, but the concept of vehicles that drive themselves is closer than you think.  Many companies, including Tesla, Mercedes, BMW and even Apple are actively working on autonomous car technology. However, while completely driverless vehicles are not yet commonplace on our roads, more and more models are incorporating technology to help the driving process.  This technology, known as Advanced Driver Assistance Systems (ADAS), is not designed to replace a driver, but to help the driver respond to potentially dangerous situations.

 

ADAS use ultrasonic, radar, laser, camera, thermal and infrared sensors to monitor the outside of a vehicle. Onboard computers use the information to take action, which could be as simple as illuminating a warning light when a car enters a driver’s blind spot. More complex systems take control of the vehicle, such as applying the brakes and/or steering to avoid a collision.
 

The potential for ADAS to save lives is huge. Human error causes the vast majority of the 2.4 million injuries and 35,000 deaths from traffic crashes every year. Research shows fewer claims for vehicles with ADAS vs. identical vehicles without the technology, demonstrating the systems are working to prevent or reduce the severity of crashes.  Putting a dent in those numbers would have a huge effect.
 

However, a new study from the AAA Foundation for Traffic Safety found that most drivers don’t fully understand how ADAS works, and tend to over-rely on the systems. “As good as these systems have become, they’re not a substitute for a fully engaged driver,” says John Paul, AAA’s Car Doctor.  “When you’re behind the wheel, your primary responsibility is to drive.”
 

AAA recommends consumers get more education about ADAS at the point of sale (from the dealer), as they expect ADAS to be incorporated as standard equipment in most new car models, paving the way for fully autonomous vehicles in (perhaps) the not-too-distant future!

For years, hybrid vehicles have used stop-start technology to improve fuel efficiency. This means the engine shuts down when the vehicle is at a complete stop – such as in traffic or at a stop light. The car’s accessories, such as lights, wipers, audio and climate control, keep operating as usual. As soon as the driver releases the brakes, the engine restarts automatically. It takes some getting used to, but the intention is to reduce fuel consumption and exhaust emissions.  More and more, this stop-start technology is now appearing on conventional gasoline engine vehicles as well.

 

Depending on the price of gas and individual driving conditions, annual fuel cost savings are estimated at around $167 – more than 12,000 miles per year in a vehicle that averages 20 mpg. Stop-start systems, which add about $300 to the traditional vehicle powertrain, can pay for themselves in just two years. However, there is one big trade-off.
 

A stop-start system requires a special, high-capacity battery, which can cost twice as much as a traditional battery.  When the engine shuts off in a stop-start system, the battery must assume the load for all the electrical needs, including charging ports, navigation and infotainment systems, lights, climate control and more. And, an engine that experiences frequent start-ups (potentially hundreds per day) requires extra battery capability. 
 

Stop-start technology is growing fast, and most manufacturers have indicated this technology will be standard equipment on models over the next few years.  John Paul, AAA’s Car Doctor, has road tested more than 1,000 new vehicles, and noticed an improvement in the technology. “Stop-start systems are much more refined and less obtrusive in day-to-day driving,” he says. “I recently drove a 2018 Dodge RAM truck and barely noticed the restart after being stopped at a traffic light.  While it may take some drivers a little time to get used to, everyone should expect this technology on their next new vehicle.” 
 

New research from AAA reveals that worn tires can cause a deadly hazard for motorists in wet weather. Performance testing at various highway speeds revealed that average stopping distances are increased a staggering 43% - an additional 87 feet - for worn tires, compared to new.

The key difference is traction. Tire treads literally connect a car to the road, and in wet conditions worn tires will completely lose contact and skid (or hydroplane). Current industry guidelines and state laws frequently recommend that drivers wait until tread depth reaches 2/32” to replace tires.  Yet AAA’s study tested new tires against tires worn to 4/32”- higher than most recommendations - and found increased stopping distance, and a reduction in handling ability on wet pavement.

John Paul, senior manager for traffic safety at AAA Northeast, says drivers should look to replace their tires when the tread depth reaches 4/32” - when stopping distances have already begun to deteriorate. “Waiting longer can be hazardous,” he adds. “Today’s vehicles are built to go longer between routine maintenance checks, so drivers may not be alerted to the tread wear on their tires until it’s too late.”

A simple test is to slip an upside-down quarter between tire grooves - on the outside, in the middle, and on the inside of the tire. If you can see all of Washington’s head on the quarter, you need to start shopping for tires.

View the complete report.

 

If Dorothy oiled the Tin Man with synthetic oil, he probably wouldn’t have rusted on the way to the Emerald City. That’s because new research by AAA Automotive Engineering on engine oil quality revealed synthetic oil outperformed conventional oil by an average of nearly 50%. What does this mean for members? For only about $5 more a month, synthetic oil will provide significantly better engine protection than conventional oil.

While consumers don’t generally want to spend additional money on synthetic oil changes (about $70 vs. $38 for a conventional oil change), the long-term benefits are worth considering.

“It’s understandable that drivers may be skeptical of any service that’s nearly twice the cost of the alternative,” said John Paul, senior manager for traffic safety at AAA Northeast. “But, while manufacturer-approved conventional oils won’t harm a vehicle’s engine, the extra $30 per oil change could actually save money in the long run by protecting critical engine components over time.”

The Car Doctor also points out, “If you are a DIYer, the difference in prices between conventional and synthetic make the switch to synthetic oil an easy decision.”

Synthetic oils have superior resistance to deterioration, and AAA’s research showed they would especially benefit newer vehicles with turbocharger engines and vehicles that tow heavy loads, operate in extreme temperatures, or are frequently driven in stop-and-go traffic.

While only a few vehicles require synthetic oil, Paul says all vehicles would benefit from making the switch. “Upgrading to synthetic oil is not merely a selling ploy by repair shops,” adds Paul. “More than 80% of service professionals use synthetic oil in their own personal vehicles because they know the value it has on the long-term health of the automobile.”

The study focused on eight industry-standard ASTM (American Society for Testing and Materials) tests that evaluated the quality of both synthetic and conventional engine oils in terms of shear stability, deposit formation, volatility, low-temperature pumpability, oxidation resistance and oxidation-induced rheological changes.

You may not be aware, but every time you use your vehicle’s navigation or touch screen audio systems, get a diagnostics report or maintenance reminder, or have your doors unlocked remotely by OnStar, you’re using telematics. Telematics is the use of wireless information to enable your car to interact with the outside world.

For the most part, telematics has made driving safer and more enjoyable with enhancements such as:

 

- Emergency assistance, such as calling the police, a tow truck or an ambulance.

- Insurance support, by providing vehicle location or disabling engine operation to help recover a stolen vehicle.

- Travel guidance via navigation services, including real-time traffic information and automatic trip rerouting to minimize delays.

- Travel information, such as points of interest, weather forecasts, fuel stations/prices, hotel and dining reservations, and more.

- Car care extras, including maintenance reminders, vehicle health reports and diagnostic information.

- Parenting assistance services, such as monitoring teen drivers and getting alerts if restrictions are violated.

“Telematics is a growing sector in the automotive landscape,” says John Paul, senior manager for traffic safety at AAA Northeast. “It offers many benefits to drivers, such as convenience, comfort, and safety. But the use of telematics brings concerns that many in the industry haven’t fully addressed yet.” Any information that can be scanned from a car’s computer system can be transmitted. This includes engine performance, vehicle location, even the driver’s weight. For example, telematics can monitor driving behavior. Some big insurance names use this information to offer discounts based on how you drive when you drive, and where you drive. This usage-based car insurance (UBI) provides more competitive auto insurance quotes if the technology deems you a “safe driver.” While this may be economical for most AAA members, several experts have raised concerns about potential discrimination, privacy issues, and the potential for unfair surcharges.

Many new telematic features in vehicles, like infotainment options and touch screens, can be a distraction to drivers. A 2013 AAA Foundation for Traffic Safety study found that these types of vehicle interactions are among the most distracting for drivers, and a 2015 AAA study of teen drivers found distracting behavior a leading cause (58%) of all crashes.

“Automakers will have to work on ways to reduce the risks and minimize distractions for all drivers,” continues Paul. “And government officials, insurance companies, and individual drivers will have to sort through the complicated issues that come with monitored driving behavior.”

Vehicle-to-vehicle (V2V) communication systems use a GPS receiver, radio/antenna and a computer to share automobile location and movement information with other V2V-equipped vehicles up to a 1/4 mile away. That information is then analyzed and used to alert the driver to potentially hazardous situations. Warnings can be provided in a variety of ways, including sounds, visual icons, control feedback or seat vibrations.

“We’ll be seeing more and more automakers add V2V systems to their vehicles,” predicts John Paul, senior manager for traffic safety at AAA Northeast. “There are definite advantages to equipping cars with this technology, from improving traffic flow on the roads, to keeping occupants safer.”

Unexpected emergencies and ineffective driver reactions result in millions of crashes every year. The National Highway Traffic Safety Administration projects that V2V systems could help prevent up to 81% of collisions involving drivers not impaired by drugs or alcohol.

In more advanced V2V systems, the vehicle could take control of the brakes and/or steering to avoid a collision if the driver fails to react in time. These systems also may employ vehicle-to-infrastructure (V2I) communications that allow drivers to receive driving conditions from traffic lights, road signs or even the highway. Notifications might be made for traffic jams, changing speed limits, or height restrictions on bridges and tunnels.

Cadillac recently introduced a V2V system in their 2017 CTS Sedan, and Volkswagen recently announced plans to equip its vehicles with the technology beginning in 2019. As the number of V2V-equipped vehicles grows, shared information also could be used to reduce traffic congestion, improve fuel economy and cut emissions.

 “New technology that makes vehicle travel safer is exciting,” adds Paul. “But we have to be cognizant of other issues that come along with it.” 

The smarter cars become — whether by parking themselves, providing maintenance reminders or indicating an approaching car in your blind spot — the more people are concerned with privacy. Cars can record massive amounts of data, including driving habits and routes traveled; knowing how and where this information is transferred is critical to its adoption. Paul also points out the vehicles’ ability to resist “hacking” should be a number one priority with vehicle manufacturers.

In June 2017, the National Highway Traffic Safety Administration and the Federal Trade Commission held a joint conference in Washington, D.C. to examine privacy and data issues in advanced car technologies. Panelists and cybersecurity experts agreed that manufacturers need to be vigilant about their methods of encryption and authentication, and must actively address any discovered vulnerabilities.

As automakers include V2V technology in their vehicles, we’ll be monitoring the issues that arise. To be continued…

Nearly nine out of 10 consumers agree that automakers should continue to improve the fuel efficiency for all vehicles, and believe that fuel economy is the area with the most room for improvement in their current vehicle.

“There are many ways car companies can make their vehicles more fuel efficient,” says John Paul, senior manager for traffic safety at AAA Northeast. “Downsizing engines, improving aerodynamics, and selling more electric and fuel cell-powered vehicles are a few examples. But one of the biggest changes will be to reduce the weight.”
 

More and more, manufacturers are adopting aluminum alloys and other lightweight materials to shave pounds off their vehicles. In fact, the amount of aluminum used in cars is expected to increase significantly by 2025, according to a recent study published by the consulting and research firm Ducker Worldwide. Components are being retooled in lighter high-strength steel, aluminum, plastic and composites. Every pound counts; studies have shown that reducing vehicle weight by 10% can improve gas mileage by 6 to 8%.
 

The new BMW i3 electric car may be the poster child for light weighting. The compact four-seater weighs a svelte 2,635 pounds, despite carrying a 500-pound battery pack. This was accomplished by using a carbon fiber passenger compartment and aluminum subframes that carry the battery and powertrain.
 

Despite using some similar materials, you needn’t worry that modern vehicles will crumple like soda cans. Lightweight cars and trucks will still be safe thanks to high-strength metal alloys and high-tech composites such as carbon fiber. These materials can be just as strong as heavier materials, and with proper engineering, they are often even better at absorbing collision impact energy.
 

“Despite carrying higher sticker prices, lightweight vehicles will use less fuel over the life of the car, allowing consumers to recoup the higher costs,” states Paul.
 

Collision repair costs and insurance premiums may also go up due to special training and equipment needs, though some experts believe the difference will be minor since the portion of most insurance premiums devoted to collision repair is small. In the end, both consumers and the environment will benefit from lightweight vehicles. That’s a diet we can probably all agree on.
 

*Source: Consumers Union National Vehicle Fuel Economy Poll, June 2017.

You may have noticed gas prices tend to increase in spring and summer. Many motorists believe it’s because more people are on the roads when the weather gets nicer. But it’s actually more technical than that.

 

There are two blends of gas – one for summer and one for winter. The difference between the two lies in something called Reid Vapor Pressure (RVP), which is a measure of how easily fuel evaporates at a given temperature. The higher the RVP, the easier it evaporates.
 

Winter-blend fuel has a higher RVP because the fuel has to evaporate at low temperatures in order for the engine to operate correctly.  The higher the RVP, the more easily the vehicle will start on a cold day, and the smoother the engine will run. This easier starting comes at a cost; you’ll see a slight reduction in miles per gallon. 
 

Summer-blend fuel uses different additives that lower the RVP in order to prevent evaporation in warmer temperatures and decrease emissions that lead to smog and unhealthy ozone levels. While summer-blend gas provides slightly better mileage, it also more expensive to produce – to the tune of a few cents per gallon. Those costs are inevitably passed on to the consumer, and that’s why prices increase.
 

Refineries switch blends twice a year, in the fall and spring. As a consumer you don’t need to worry about the switch, but now you understand the reason for the higher prices at the pump.

More and more vehicles come equipped with features to assist drivers, such as adaptive cruise control and lane-keeping assistance. When these two systems are combined to work as one, this is known as active driving assistance (ADA), which is considered to be the highest level of automated vehicle technology available to consumers today. 

 

ADA is a level beyond common advanced driver assistance systems (ADAS), combining braking, accelerating, and steering to actively assist the driver. ADAS – such as blind-spot warnings and automatic braking – engage only when needed. Think of ADA systems as “always-on", where ADAS systems activate when a situation calls for it.
 

A recent research study from AAA found that over the course of 4,000 miles of real-world driving, ADA-equipped vehicles experienced some type of issue every 8 miles. This included difficulty keeping the vehicles in their lanes, coming too close to guardrails or other vehicles, and disengaging with little notice (instantly giving control back to the driver). All these issues are extremely dangerous if the driver has become inattentive or distracted, or is too reliant on the system. 
 

For instance, on public roads, almost 75% of all errors with ADA systems involved erratic lane position or lane departure. And, when approaching a simulated disabled vehicle, a collision occurred 66% of the time. 
 

AAA recommends manufacturers perfect the technology as much as possible before deploying into a larger fleet of vehicles. While studies reveal that only one in ten drivers would trust riding in a self-driving car, a future of automated vehicles doesn’t seem so far away.  These systems are still in their early stages of development, and nothing can replace an attentive, engaged driver on the roadways.
 

Learn more on the research study.

Vehicle escape tools – such as hammers or spring-loaded devices – are highly recommended for the rare but dangerous situation where you need to escape your car after an accident. Ideally, it’s something you’ll keep in your glove compartment and never need to use, but recent AAA research has shown that not all tools perform as expected. And it's largely due to newer car technology.

 

A study from AAA found that most escape tools will break tempered glass, but not laminated glass. In research of six tools – three hammer style and three spring-loaded – none were able to break laminated glass, which stayed intact even after being cracked. The study also found that spring-loaded tools were more effective in breaking tempered windows than the hammer-style.
 

Tempered glass, commonly used for side windows, is designed to shatter into small pieces. Laminated glass, typically used for windshields, has a layer of plastic between two pieces of tempered glass. This layer increases the strength of the glass, holding it together and preventing it from shattering.
 

Today’s cars usually use the two types of glass, but more and more manufacturers are using laminated glass in their side windows. In fact, about 33% percent of all 2018 models have laminated side windows, a 67-percent increase from years prior. About 4 percent of 2018 models have laminated front, side and rear windows.
 

A majority of cars still has at least one window made of tempered glass, so it’s important to know what kind of glass each of your vehicle’s windows is made of. Check the label on each window of your car to determine if the glass is tempered or laminated. Get a tool that’s right for you and familiarize yourself with how it works.  You’ll likely never have to use it, but it’s nice to know it’s there.

More than 53 million vehicles, car seats, and tires were recalled in 2019. Yet some people ignore recall notices, even though repairs of these issues are done free of charge. The National Highway Safety Administration has developed a new app, SaferCar, to let you know if your vehicle(s), tires, or car seats have been recalled and will notify you if a recall is announced. The app also provides access to other NHTSA online tools, such as safety ratings and the car seat finder.

 

AAA’s Car Doctor, John Paul, chatted with Stephen Riddle, Director of NHTSA’s Office of Defects Investigation to discuss how the SaferCar app works, and talk about the importance of recalls and other safety measures in today’s cars. View the conversation.

AAA has released the latest Car Guide to help consumers navigate the changing automotive marketplace. The annual report ranks and rates the newest vehicles available for sale, including alternative fuel vehicles. This year, a large portion of consumers, (80%), want manufacturers to focus on improving fuel economy, and 76% want more driver assist features, such as automatic emergency braking, lane keeping assistance and adaptive cruise control.

 

These desires can be met with the newest vehicles in the market, especially the top choice for 2022, the Ford Mustang Mach-E Premium AWD. This electric vehicle has a new profile, and is quiet, roomy, and fun to drive. 

 

More information on the Mustang, as well as reviews and rankings for 62 of the newest vehicles, can be found in the online Car Guide, which helps consumers make educated decisions when purchasing a new vehicle.

Every year, AAA conducts in-depth research to determine the cost of owning and operating various vehicle models. These expenses go above and beyond the monthly payments, and include fuel, maintenance, insurance, and financing charges, as well as depreciation. Depreciation — how quickly a car loses its value — remains the single biggest cost in new vehicle ownership, accounting for 40% of the overall cost.

 

The latest study, which looked at nine categories and 45 models, determined the average annual cost of a new vehicle is $9,666, or $805.50 per month. With the average price of a new vehicle in 2021 at $32,903, consumers need to be aware of all the expenses associated with ownership so they can negotiate the best deal for their budget.

 

The annual cost is broken down as follows:

 

- Fuel costs, on average, cost 10.72 cents per mile (not including spikes in prices due to the Ukraine crisis). These costs vary widely based on vehicle type, with EV costs averaging 3.66 cents per mile and pickups hitting the high end at 15.81 cents per mile.

- Maintenance, repair and tire costs average 9.55 cents per mile. EVs are at the lower end (7.70 cents per mile) and sedans at the other end of the spectrum (10.43 cents per miles).

- Finance charges decreased in 2021 due to the drop in the prime lending rate, averaging 4.12%, which is 1.056 percentage points lower than 2020.

 

The study also reviewed buying patterns and trends and found that consumers have been moving away from sedans to SUVs. As a result, manufacturers have added new model sizes to their lineups, which are reviewed in the Your Driving Costs report. The full report can be downloaded below, and consumers are encouraged to use the online Car Guide and our Auto Buying Program to ensure they’re getting the best deal.

How many times have you used the “miles to empty” display to decide when to fill up your tank? Or tested the limits of the “low fuel” warning on the dashboard? According to a study by AAA, you may be tempting fate. After testing the accuracy of in-dash fuel economy displays in vehicles, they found the error rate varied greatly from vehicle to vehicle, from -6.4% to 2.8%. The negative number indicates that the vehicle overestimated fuel economy by 6.4%, or 2.2 mph, while another underestimated it by 2.8%, or 0.9 mph.

 

What does this mean for consumers? Each vehicle reacts differently to changes in driving and is impacted by driving style and conditions. The range estimation is affected by the vehicle’s most recent driving conditions, so can vary greatly if you’re cruising at highway speeds or stuck in traffic jams.

 

The bottom line: don’t rely on in-dash displays to determine when you should fill up. AAA recommends filling up when the gas gauge reaches a quarter of a tank to avoid a potentially risky situation.

 

“When prices are higher or fluctuate greatly, people want to get the most of every tank of gas,” explains John Paul, AAA’s Car Doctor. “But it’s not smart to risk running out of gas to save a few pennies. Keeping your gas tank at least a quarter full is safer and will help prevent damage to the fuel pump that can occur when the tank is regularly run down to empty.”

 

Other tips to maximize fuel economy:

 

- Plan ahead and run multiple errands in one trip. Try to avoid times of day when traffic is heavier.

- Avoid hard acceleration to maximize fuel economy.

- Keep your tires inflated to the recommended pressure found inside the driver’s side door or in the owner’s manual.

- Remove bulky items from your car and minimize use of roof racks and special carriers when not in use. Smaller cars will experience a bigger reduction in fuel economy than larger models designed to carry more weight.

- Minimize use of air conditioning; open windows have less effect on fuel economy than the engine power required to operate the AC compressor.

- In hot and sunny weather, park in the shade or use a windshield screen to lesson heat buildup inside the car, eliminating the need to use the AC to cool down the car. 

 

There’s no question that safety systems in new vehicles prevent crashes and keep drivers safe. However, as drivers tend to rely more and more on these systems, it’s important to note that conditions can affect the way they perform. A recent AAA research study showed that moderate to heavy rain can affect these systems — especially automatic emergency braking and lane keeping assistance, two of the most common.

 

During closed course testing, the study found that the sensors and cameras used to see road markings, other cars, pedestrians, and obstacles were affected most by moderate to heavy rain. Vehicles equipped with automatic emergency braking traveling at 35 mph collided with a stopped vehicle one third (33%) of the time in these conditions. Lane keeping assistance fared worse, with test vehicles departing their lane 69% of the time.

 

Most testing of these safety systems — known as Advanced Driver Assistance Systems (ADAS) — is performed in ideal operating conditions when they work best. However, AAA believes testing standards must incorporate the real-world conditions that drivers encounter every day.

 

The research also simulated other conditions — such as bugs and dirt — to measure the impact on ADAS. They found that the cameras and sensors can also be affected by a dirty windshield, so drivers should clean those regularly to make sure there are no obstructions.

 

“These systems will lessen the chance of a crash and improve overall safety, but there’s no replacing a fully engaged driver,” says John Paul, AAA’s Car Doctor. “The word “assistance” in ADAS is important … these systems are there to help the driver but are not a replacement. They can be affected by weather and conditions, so all drivers should be alert every time they’re behind the wheel.”