Use this tag for question about cars, trucks and other road transport.

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140 views

Did Mercedes-Benz purposely obfuscate their engines?

A friend recently told me that the reason old Mercedes-Benz cars are so difficult and expensive to fix, is because they used to obfuscate their engine designs to ward off any copy-cat production and ...
10
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1answer
222 views

Does 80-90% of the environmental and health damage a car causes come from manufacturing?

Claim from the video The First 3D-Printed Supercar: How we make them [cars] is much more important than how we fuel them and whether they have a tailpipe or not. 80 to 90 percent or more of the ...
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0answers
258 views

Do trains/boats/planes involved in accidents have a lower occupancy?

This Article from the daily mail makes some interesting (and rather ludicrous) claims, but one stuck out to me specifically. The article argues that higher cancellation rates/lower occupancy on ...
6
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0answers
420 views

Do strobes on top of school buses improve safety?

Background In many states of the USA, school buses are fitted with a "roof-mounted strobe". In some states, they are required by law: Mike Simmons, state director in Arkansas, says that the ...
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2answers
5k views

Are recent claims from India of a car fueled by water and calcium carbide legitimate?

Recently, I came across a video and a news report where it has been reported that a man from India has invented a car which uses water as a key fuel component. The car runs on acetylene gas produced ...
5
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1answer
194 views

Was there a time when the RSL banned Japanese cars from their carparks?

From Prime Minister - Address at CEDA's 2014 State of the Nation Conference, Parliament House, Canberra Prime Minister Menzies for instance opened up trade with Japan at a time when Japanese cars ...
5
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0answers
215 views

Was a self-driving car pulled over by police for the first time last month (November 2015)?

I read in this Bloomberg article Google cars have been in 17 minor crashes in 2 million miles (3.2 million kilometers) of testing. [...] Ten days later, a Mountain View motorcycle cop ...
10
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1answer
378 views

Does an e-bike produces only 1/10 carbon emissions for each mile of an conventional electric car?

According to Lin, Bo (Deputy General Director at Furi E-Bike1): he says the following in an interview in the program Horizons from WOBI: Bicycles to lead acid battery generates some pollution. The ...
3
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1answer
361 views

Can all new gasoline vehicles run on E85 ethanol-based fuel?

From the the documentary Pump at 1:07: NARRATOR: But what if we don't need a flex fuel car or even a kit? What if the car you drive today already contained the technology that could enable it ...
18
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1answer
452 views

Is widespread adoption of the electric car unlikely due to lithium scarcity?

Although lithium is very abundant in sea water, only lithium mineral extraction seems to be economically viable. The world's total reserves in lithium minerals is estimated at 13.5 Mt (not sure ...
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0answers
19 views

Does leaving the fan on during an RV a/c cycle time save energy? [duplicate]

When running an RV a/c during the summer, is it more energy-efficient to let the fan run while the compressor is cycling? Does it cause more wear and tear? Does it even matter if you allow the fan to ...
2
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0answers
427 views

Could you survive a vertical 100m drop in a BMW hatchback? [closed]

In Mission Impossible Ghost Protocol, at 116:42, Ethan Hunt (played by Tom Cruise) drives a BMW 1181 hatch off of an auto car transporter: He was wearing his seatbelt: And the air bag deploys: ...
7
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3answers
252 views

How effective are reflectors at preventing pedestrian deaths?

http://www.safetyreflectors.com/education.html has some claims about reflectors: Studies have proven that the risk of being hit by a motorist in the dark is eight times lower when wearing a safety ...
5
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0answers
374 views

Does an old car with engine turned off pollute more than a new car going 60 mph? [closed]

On the show Real Time with Bill Maher (Jan 9, 2015), Jay Leno (a guy that seems knowledgeable about cars) made this very interesting statement 37 minutes in: A 1977 Ford Galaxy, one of those big ...
11
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1answer
471 views

Is driving stoned safer than driving drunk?

Some support that driving while under the influence of marijuana is safer than driving when drunk, saying that people who drive high always drive at slower speeds so even if they cause an accident, it'...
2
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0answers
88 views

Do I need to wait for my car to warm up before driving off? [duplicate]

I heard many times from friends that after starting up the engine of a car you have to wait a few minutes for it to warm up before driving off. I also heard that this only applies to engines that ...
13
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2answers
722 views

Do electric cars create more fine dust pollution than comparable petrol cars?

According to this Flanders Today (a local Belgian newspaper) article a new small car on petrol in the city creates less fine dust than an electric car of average size. The researcher, Bruno ...
3
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1answer
304 views

How many pedestrians die a year in NYC from being hit by a car?

In researching my other question, I found a hard time getting all the sources of numbers of deaths to agree with each other. Some of the numbers I found are as follows: 168 pedestrians and 10 ...
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1answer
268 views

Would lowering the speed limit in NYC by 5mph lower the number of pedestrian deaths by a factor of 2?

According to the Mayor of New York City, De Blasio: (my emphasis) Excessive speed contributes to 25 percent of roadway fatalities on New York City Streets and is the leading cause of motor vehicle ...
5
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1answer
250 views

Did Volkswagen, Chrysler and/or GM cut diesel tailpipe emissions by ~99% over a decade?

This article, dated Jan 5, 2014, makes a rather vague claim that Companies such as Volkswagen AG, Chrysler Group and General Motors have invested billions to make that happen, outfitting vehicles ...
12
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1answer
999 views

Do Jet Skis produce in an hour equivalent pollution to 100,000km of a new/small car?

I recall this claim being published in a newspaper a while back but time has buried it in the Interwebs, though it does come up from time to time as e.g. Driving a jet ski for one hour will ...
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0answers
249 views

Is there a viable design for a thorium car that can run for 100 years without being refueled?

This article and included video from Young Turks claims that Laser Power Systems has produced a "concept for a car" which can run for 100 years on 8 grams of thorium without needing t be refueled. ...
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0answers
344 views

Is using a phone while driving more dangerous than driving while drunk?

There have been numerous studies that show how using a phone while driving is more distracting than other non-driving tasks and even worse than driving while intoxicated. Here was a study done in the ...
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1answer
1k views

Is gearing down more energy efficient than braking?

When spotting a red light or similar, I often release the gas pedal, gear down and let the engine decelerate instead of pressing the brake pedal. I was taught that this was more energy efficient for ...
12
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2answers
9k views

Are there lots worldwide filled with thousands of unsold new cars left to ruin?

This link came in an email that was getting passed around the office today: http://www.vincelewis.net/unsoldcars.html The premise is that car manufacturers, not wanting to dilute their inventory to ...
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1answer
2k views

Is a car's fuel consumption increased when the headlights are on?

I have read in many sites that a car with lights on will consume more fuel that with lights off. The (hand-waving) justifications that I see tend to mention that "energy has to come from somewhere" ...
2
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0answers
408 views

Do car theft victims have to pay around 1,000 USD to have their cars returned in the US?

This Yahoo! news article says: The 30-year-old’s 2000 Monte Carlo was stolen from in front of his mother’s house last summer. Finally, several months later, Williams was told that his car had ...
2
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0answers
94 views

Can a car run on water? As per this experiment [duplicate]

The Agha Waqar's car that ran on water was a great news for a long time. Where a Pakistan based inventor invented a car that got all the power from water. He was using a water kit to get the energy. ...
17
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2answers
5k views

Did the US ban the Volkswagen XL1 for being too fuel efficient?

There are dozens of articles similar to this one floating around claiming the new Volkswagen XL1, which can get 300+ MPG (0.78 L/100 km) in ideal driving conditions, has been banned in the USA because ...
7
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0answers
250 views

Does lowering speed limits by 10 km/h have any impact on air pollution?

Europe has been under exceptional sunlight for the past ten days, cf. Eumetsat's picture. According to French media, this prevents smog from escaping major hubs. In an attempt to reduce this air ...
22
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3answers
4k views

Have more people been killed by automobiles than by all wars combined?

I read this claim somewhere recently, and a google search shows that it's occasionally made around the web, but was perhaps more common in the 1970's (many of the stories I find online are people ...
7
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1answer
370 views

Do directional tread patterns on tires reduce hydroplaning?

Treaded car tires are said to be better at avoiding hydroplaning than smooth tires (slicks) in the rain. In particular, directional treads are thought to be the best. The following is an example of ...
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1answer
417 views

Are pets as bad for environment as cars?

In this article referring to a book the authors claim: Taking the dog for a walk to the store would seem like a more environmentally-friendly option than piling into the SUV. Not so, say ...
16
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1answer
387 views

Does a start-stop system for a combustion engine pay off?

A start-stop system stops the engine when the car comes to a halt, for example, in front of a traffic light or during a traffic jam. The engine automatically restarts when pressing the clutch or the ...
6
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1answer
828 views

Did the Paul Walker crash happen at ~45 mph speed?

Heavy.com report that the car crash that killed actor Paul Walker was at about 40-45 miles per hour (64-72 km/h). They cite an NBCNews tweet: Update: Paul Walker was not drag racing at time of ...
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2answers
2k views

Did Jean-Claude Van Damme do a suspended split between two trucks?

This Volvo Trucks ad shows actor and martial artist, Jean-Claude Van Damme, performing a suspended split between two moving trucks, driving in reverse. I tend to think that what we see in the video ...
12
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0answers
286 views

Is there a high ecological impact from buying a new car?

First, a disclaimer: this is my first question here, so please point out any deficiency so I can amend it. Here in Italy, the Government has a recurring policy (it is happening every 2/3 years now) ...
27
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1answer
4k views

Did 9/11 lead to many deaths due to car accidents “dwarfing” the attacks themselves?

Well-renowned security expert Bruce Schneier claims that In the months after 9/11, so many people chose to drive instead of fly that the resulting deaths dwarfed the deaths from the terrorist ...
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1answer
574 views

Does HONDA have a model called CBR 660RR?

http://www.sagmart.com/news/Automobiles/honda-is-going-to-reveal-its-new-bike-cbr-600rr-this-december The design of this new CBR is awesome; you surely skip a beat when it passes through the way....
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2answers
2k views

Does marijuana impair driving?

Is the use of cannabis/marijuana/THC associated with risks when driving a motor vehicle, similar to impairment from the use of alcohol? The conclusions of public studies seem inconsistent. For ...
25
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1answer
9k views

Is using cruise-control dangerous in the rain?

A meme from Facebook with 62,000+ shares: Excellent Driving Tip: A 36 year old female had an accident several weeks ago. It was raining, though not excessively when her car suddenly began ...
13
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0answers
11k views

Can boiling water break car windows?

A friend of mine in Australia has heard from several of her friends that it's unsafe to pour boiling water on car windows in order to defrost them. Online examples of people claiming it's unsafe ...
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1answer
648 views

Why are car seat belts mandatory in some countries? [closed]

Seat belts reduce serious crash-related injuries and deaths by about 50%. It is compulsory in some countries (several US states, Canada, Australia, most all of European countries, ...) and others are ...
7
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1answer
2k views

Are manual transmission cars stolen less?

There is a decent amount of anecdotal evidence about manual transmissions being a good anti-theft device - but are there any statistics? Here's a statistic-less article from MSN.com It's folk ...
7
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2answers
12k views

Is a repaired car tire as good as a new one?

I recently had one of my car tires punctured by a screw. It lost pressure only very slowly, it probably took a couple of days before I noticed the tire was below pressure. The guys from the tire ...
3
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1answer
1k views

Radiation dangers with GPS/navigation cellphone apps [closed]

From Wikipedia: Some national radiation advisory authorities... have recommended measures to minimize exposure to their citizens... Do not use telephone in a car without an external antenna I'd ...
4
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1answer
18k views

Do modern turbo-diesel car engines fail significantly more often than gasoline ones?

I've seen quite a few articles written on subject, mainly based on anecdotal evidence and with generally alarmistic tone. Allegedly modern turbo-diesel engines used in popular cars are much less ...
15
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2answers
948 views

Shouldn't an electric car be thermodynamically at a disadvantage towards one with a combustion engine?

I have the greatest respect for the work of the Rocky Mountain Institute, but this recent blog post triggered my general scepticism towards electric cars, or more specifically, their fuel efficiency. ...
25
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3answers
41k views

Were there only two cars in Ohio in 1895, and they managed to crash into each other?

Currently on Today I Learned, Reddit. TIL [Today I Learned] In the entire state of Ohio in 1895, there were only two cars on the road, and the drivers of these two cars crashed into each other. ...
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1answer
2k views

Does putting a reflective screen inside your car against the windshield have a meaningful impact on internal temperature?

In southern climes one can see many such reflective screens on cars in parking lots. Not all drivers use them, but many do. Is there a meaningful impact on the internal temperature of your car? Does ...