Questions tagged [road-vehicles]

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

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37
votes
1answer
88k 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. ...
7
votes
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 ...
6
votes
1answer
447 views

Does cryogenic treatment of automobile rotors increase performance?

In the performance brakes world, there is a small amount of debate about the benefits of cryogenically treating rotors, with most people believing that cryo treating rotors greatly improves their ...
21
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1answer
19k views

Is it illegal in any U.S. jurisdiction to be in neutral at a red light?

In this related question, I asserted that it was illegal to be in neutral gear while stopped at a red light. The first comment to that question challenged me to quote chapter and verse. Astonishingly,...
11
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2answers
28k views

Are Auto Manufacturers required under US Federal Law to provide parts for a set period of time?

Via snopes.com Message Board and here, and a similar question on mechanics.stackexchange.com: Auto manufacturers are required by US Federal Law to have parts available for any models they sold for ...
4
votes
1answer
506 views

Are “black-box” data recorders to be installed in all new US cars?

Occupy Corporatism reports: With complete disregard for driver privacy, the Obama administration gave their consent to the National Highway Traffic Safety Administration (NHTSA) to mandate black box ...
8
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3answers
41k views

Does a turbo-charged engine require a “cooling down” period?

Some people are saying that after having driven a car with a turbo-charged engine, you need to let the engine run for several seconds (or even minutes) before switching off the engine. But nobody is ...
2
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1answer
4k views

Can a Renault Megane drive 1700 km with 1 tank?

source See the above advert which claims that Renault Megane can cover 1700km with one tank. According to this link the Megane model has a fuel tank capacity of 60 Liters. Can the Megane cover 28.3 ...
48
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3answers
7k views

Are speedometers designed to read high?

Via word-of-mouth, I have twice heard claims that speedometers are deliberately designed to read high, so manufacturers would not be subject to litigation for speeding. When I first heard this claim, ...
7
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2answers
4k views

Does the Lexus LFA need digital gauges because analogue ones are too slow?

I first heard this claim a few years ago on the Top Gear program from the BBC. Since then I keep hearing it whenever I hear the Lexus LFA discussed. From this February 2012 article: This ...
18
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1answer
3k views

Does locking your car doors reduce theft?

Almost everyone I know locks their car doors when they leave their vehicle for an extended time. However, I come from a country town and most people in that country town don't lock their car doors and ...
7
votes
2answers
6k views

Do you need to break in new engine on a car/bike for first 1,000 km by driving slowly and otherwise following manual's advice?

Normally car manuals say to let the car break in gently, not accelerating or breaking fast for first 1,000 km or driving below 80km/h. Is that really necessary in today's world? Is there any proof ...
3
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0answers
102 views

Should we heat up engines before driving a car? [duplicate]

Possible Duplicate: Is running the engine for five minutes before driving beneficial for the car? My wife, her dad, and my dad says so. They said that before you drive a car, you need to turn on ...
4
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0answers
1k views

Are rear-end collisions more dangerous in Compressed Natural Gas (CNG) than Petrol cars?

Is it more dangerous to be in a passenger car with compressed natural gas than with a petrol fuel tank when it comes to rear-end collisions? Lawrence Godwin, on eZine claims there is a explosion risk ...
4
votes
1answer
708 views

Does Honda Civic CNG fare well in crash safety tests as claimed by its manufacturer?

Honda touts great safety for their Civic CNG, but I have second thoughts concerning their fuel tank's safety in rear-end collisions. I looked for some tests and data, but could not find anything ...
14
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1answer
8k views

Can you puncture a tire with a Swiss Army knife?

On films and TV you always see characters puncture a regular car tire with something like a folding knife or a swiss army knife. How hard would it be in real life to do this?
17
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0answers
5k views

Do gas pods improve fuel efficiency?

I ran into this claim today about detachable car fins, and was wondering if there is any validity to it: about a five percent reduction in drag and corresponding five percent boost in fuel ...
6
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2answers
2k views

Does the time of day affect fuel economy?

One tip that I heard as a young driver was something along the following: Try to refuel in the early morning or in the evening as the denser gas will get you better fuel economy. Since then I ...
16
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4answers
7k views

Are there benefits to filling car tyres with Nitrogen?

A friend was informed by his mechanic that his tyres were filled with Nitrogren rather than compressed air. He was skeptical of the claims he heard: There are major benefits with nitrogen inflation ...
8
votes
1answer
1k views

Is it illegal to stop a car for a pedestrian crossing in China?

Today while preparing for one of my classes, this time on law, I found the snippet on a great many websites saying that in China: Drivers of power-driven vehicles are forbidden to stop at ...
22
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1answer
5k views

Does the US ban high-gas-mileage cars?

A recent YouTube video features a claim that the VW Passat TDI 1.6 and similar cars have been banned by the US government, specifically because their gas mileage is too high. The purported reasoning ...
9
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2answers
2k views

Does a prototype car that runs on water exist?

In a conversation with a friend recently, she was telling me about a new car that "some Japanese company" had developed, apparently a working prototype that's about to be put into production. It has ...
9
votes
1answer
719 views

Can an on-the-fly water electrolyzer linked to the air intake improve fuel efficiency of a gasoline engine?

This article initially seems to investigate so-called water powered cars. The final few paragraphs of the article however branches off into discussion about a system where (as I understand it): A car'...
6
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0answers
6k views

Does a car tire require 26 Liters / 7 US Gallons of crude oil to manufacture?

I've recently seen the movie Collapse. They make many claims about oil and an hypothetical global collapse when it runs low. In this movie, Michael Ruppert says that a simple car tire needs 7 US ...
11
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1answer
724 views

Is reducing carbon emission from cars futile?

One of the claims in "SuperFreakonomics" is, that reducing CO2 emissions produced by cars have very little practical impact on global warming. Their arguments are: human activity is responsible for ...
21
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2answers
18k views

Are more people accidentally killed by doctors than accidentally killed by guns and traffic combined?

The actual claim is something like this The top five causes of death in the United States, in order, are tobacco, alcohol, medical malpractice, traffic and firearms. According to JAMA, doctors ...
6
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4answers
6k views

Are BMW Owners the worst drivers?

BMW drivers are widely thought to be poor drivers. For example, in a poll for Auto Trader: Around 21,000 motorists were quizzed, and 45 per cent said BMW drivers were the worst on the road. Is ...
34
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2answers
4k views

Does the 'two-second rule' provide a valid minimum gap for safe driving?

Most of us will have been taught the two-second rule when learning to drive. The two-second rule is a rule of thumb by which a driver may maintain a safe following distance at any speed. The rule ...
31
votes
1answer
16k views

Is running the engine for five minutes before driving beneficial for the car?

There is a belief among a lot of people that you should start your car and leave it on for 5 minutes before moving it in the morning. Is this practice good for the car in any significant way, or it is ...
9
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0answers
409 views

Did a Blackberry service outage reduce traffic accident rates in Dubai and Abu Dhabi?

A report from The National has been widely cited on the Internet recently: A dramatic fall in traffic accidents this week has been directly linked to the three-day disruption in BlackBerry services. ...
24
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2answers
7k views

Are big cars and SUVs safer than small cars or do they just *feel* safer?

I've long observed that many drivers in the UK choose SUVs (which are often disparagingly called Chelsea Tractors) do so at least partially because they believe such cars to be safer. I doubt this ...
4
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3answers
2k views

Can remote starters make a car move unattended?

On an episode of a popular television show, a man is showing off his new truck. While bragging about the interior, he accidentally hits the stick with his arm, and puts it in gear. Then, when he ...
14
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1answer
3k views

Do black cars consume more fuel?

Some time in 2009, California passed new regulations, banning black cars (here's one source) on the grounds that black cars have higher emissions than other colors of cars. The theory is that black ...
35
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1answer
4k views

Are old car models more reliable than new ones?

I heard that components from older cars (like the ones before '92-93) are more resistant than the ones from new cars. New ones are made from cheap elements, so if you push them to the limit they will ...
17
votes
2answers
6k views

Do speed bumps cause more deaths than they save?

After a few speeding incidents in a residential neighborhood, some residents will clamor for speed bumps. In case your municipality does not have one, here is a picture of a speed bump (also AE ...
20
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1answer
8k views

Does driving a car in a lorry's slipstream increase fuel economy?

On UK roads, I frequently see cars driving very closely behind larger vehicles, attempting to stay in their slipstream, reduce drag and thus increase fuel efficiency. Given the dangers of driving so ...
8
votes
2answers
3k views

Seat belts in cars save the lives of occupants in cars, but do they lead to lower deaths for all road users?

Reading and contributing to the skeptics debate about the effects of cycle helmets reminded me of the much more significant debate on seat belts in cars. Most countries seem to have accepted that ...
14
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3answers
5k views

Can you improve a car's engine by driving the car fast?

Many car enthusiasts claim the following: take 2 identical cars (equal horse power, torque etc). give one car to an old person who only drives it slowly give the other car to the car enthusiast ...
16
votes
1answer
6k views

Does waxing your car have a long-term beneficial effect on the paint-work?

Everyone, especially people who love washing and waxing their cars, has been telling me about the long-term benefits of regular waxing. They tell me that the layer of wax acts as a protective shell ...
17
votes
1answer
3k views

Does a windshield provide most of a car's integrity?

I've heard radio car commercials and other sources state that a vehicle's windshield provides most of a car's structural integrity. I believe that the company that owns the commercial is Mark's ...
50
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3answers
4k views

Is cycling worse for the environment than driving to work if you need to take a shower?

I had an argument with a work colleague. He claims that me cycling to and from work is less environmentally friendly than driving because I will eat more as a result of expending more energy. I have ...
18
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1answer
2k views

Are Hummers more environmentally friendly than Prius?

I've heard this rumor a few times (example). The argument is that it takes energy to make the car, and when you take into account how long each car will last on the road, driving Prius's over a large ...
18
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1answer
4k views

Is formaldehyde the source of the “new car smell”?

We bought a new car and the smell reminded me of something I was curious about: I remember reading somewhere that the smell of new car is actually the "smell of death" - that is, the smell of ...
9
votes
1answer
3k views

Can riding a motorcycle without earplugs cause hearing damage?

I've heard claims before that when riding a motorcycle, wind noise (especially on the highway) is loud enough that it will cause eventual hearing loss. Personally, I ride a motorcycle, and I usually ...
52
votes
3answers
5k views

Is using the A/C in a car less fuel efficient than having the windows down?

This is an age old debate that i have with a coterie of friends; without backing up with much scientific fact. It's all recently been based on arguments of experience. Is it possible that utilizing ...
16
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3answers
2k views

Are electric cars beneficial to the environment compared to low consumption modern cars?

Imagine an electric car in a country where most energy come from coal (which i believe is the dirtiest). Add this to the pollution that disposing the batteries will create, or the carbon footprint ...
14
votes
2answers
6k views

Is it possible to detect a laptop inside of a car boot?

Recently someone at a party told me thieves could detect a laptop in the car boot, even when turned off. At first I thought this was ridiculous, but I found some google queries provided a theory, the ...
29
votes
1answer
59k views

Will putting a car remote under your chin increase its range?

Image source: Miniseed blog I've heard this before and anecdotally have thought I've experienced it working, but I thought I'd ask here. Many years ago, someone told me that putting a car remote (...
15
votes
2answers
495 views

Does the gasoline of different gasoline brands have any real acknowledgable difference?

A friend of mine said that he could apparently get better mileage using Chevron oil instead of Shell's (and other brands). Is there any substance to this claim?
6
votes
1answer
11k views

Eggs + Water = Total windscreen blindness!

I was just sent this hoax email, but wanted to check one of the claims in it: IF YOU ARE DRIVING AT NIGHT AND EGGS ARE THROWN AT YOUR WINDSCREEN, DO NOT STOP TO CHECK THE CAR, DO NOT OPERATE ...