Questions tagged [road-vehicles]

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

4
votes
1answer
690 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
votes
1answer
7k 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?
18
votes
0answers
4k 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
votes
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
votes
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 ...
21
votes
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
votes
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
700 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
votes
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 ...
12
votes
1answer
588 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 ...
20
votes
2answers
17k 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
votes
4answers
5k 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 ...
28
votes
2answers
3k 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 ...
30
votes
1answer
14k 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
votes
0answers
407 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....
23
votes
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
votes
3answers
1k 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
votes
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
votes
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 ...
16
votes
2answers
5k 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
votes
1answer
7k 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
votes
3answers
4k 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 ...
14
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 ...
49
votes
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
votes
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
votes
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 ...
44
votes
2answers
4k 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 ...
14
votes
3answers
1k 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 ...
28
votes
1answer
58k 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
482 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
10k 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 ...
32
votes
3answers
20k views

Did older car odometers rewind when driving backwards?

I've always heard that way-back-when, the simplest way to rewind a car's odometer was to drive backwards (at least in some models). Is this true? Did those manufacturers miss such an obvious gaming ...
9
votes
0answers
388 views

Are electric cars better for the environment than internal-combustion cars? [duplicate]

Possible Duplicate: Does a car with a hybrid engine and Lithium batteries pollute more than a car with conventional technology? We hear a lot about electric cars being the future. But we also ...
24
votes
1answer
13k views

Do cars primarily built on a Monday or Friday have lower quality?

In his 1971 book Wheels, Arthur Hailey claims that cars that were primarily assembled on a Monday or Friday would suffer from quality problems due to worker performance/absenteeism issues associated ...
19
votes
4answers
7k views

Does flooring the gas pedal reduce mileage?

Many websites that give tips on increasing mileage mention (typically in passing) that you should not accelerate hard. Examples include (from the first two google hits on "increase gas mileage") ...
20
votes
2answers
3k views

Do elderly drivers cause the most accidents?

Has it been statistically or empirically proven that elderly drivers (65 and over) are responsible for more accidents than any other age group? Some offer figures such as: In 2001 drivers over 70 ...
12
votes
1answer
1k views

Did the Renault Espace sell only 9 cars when it was launched?

According to Richard Hammond of Top Gear, Renault's entry into the people carrier market sold just nine cars in its first month (1:18 - 1:27). However, I cannot find a single source to back up ...
11
votes
1answer
3k views

Is it better to cross rough railroad tracks very slowly or at normal/higher speeds?

When encountering the average bumpy railroad crosssing such as the one pictured above, does slowing down almost to the point of stopping (as you would for a speed bump) produce less stress on the ...
21
votes
2answers
3k views

Do carpool lanes help reduce traffic congestion more than adding an extra lane would?

Many cities have added carpool lanes to their roads, in hopes of encouraging people to carpool and reduce traffic. The idea is that, not only does the road now have an extra lane, there will also be ...
4
votes
1answer
836 views

Is there a difference in driving ability between men and women? [duplicate]

Possible Duplicate: Does gender affect driving skill? Time and time again I hear that "women shouldn't be allowed on the road because they are bad drivers" or similar stories. I'm personally of ...
6
votes
1answer
5k views

Does the type of oil you use in your car make a difference?

I have a car that has over 140k on it. Are there any valid reasons to use high milage oil instead of conventional oil? Or is it just a marketing gimmick? Similarly what's the difference between ...
56
votes
3answers
9k views

Is it necessary to change motor oil every 5,000km/3,000 miles?

I've always heard that you should change your oil every 3,000 miles (5,000 km). That little sticker you get on your windshield after an oil change agrees. Growing up, my parents told me the same thing....
41
votes
4answers
5k views

Is driving the speed limit on a highway safer?

I'd have thought this would have been asked already but I didn't see it. Is driving the speed limit safer on a highway? By "highway" I mean high-traffic areas, such as 4-lane divided thoroughfares. ...
18
votes
1answer
1k views

Does Ferrari cheat at track tests?

The article How Ferrari spins by Chris "Monkey" Harris contains claims that Ferrari has dishonest practices with the press. How bad has it been? I honestly don't know where to start. Perhaps the ...
28
votes
3answers
1k views

Do cars pass with less space for bicyclists who wear helmets?

This question is an off-shoot of from the discussion about helmet safety. There is an assertion that when a car passes a bicycle, it allows less space to those who wear a helmet than those without. ...