Questions tagged [road-vehicles]

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

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10 votes
0 answers
370 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 ...
14 votes
1 answer
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?
6 votes
0 answers
522 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 ...
26 votes
2 answers
6k 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 ...
11 votes
2 answers
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 ...
15 votes
3 answers
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 ...
7 votes
1 answer
541 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 ...
20 votes
2 answers
3k 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 example,...
30 votes
1 answer
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 ...
6 votes
0 answers
377 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 noticed traffic ...
11 votes
1 answer
688 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 ...
15 votes
2 answers
511 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?
7 votes
1 answer
843 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 to ...
18 votes
1 answer
629 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 ...
30 votes
1 answer
5k views

Do car alarms provide a significant reduction in automobile theft?

Noise That movie got me thinking, because it makes a number of claims about car alarms that jive with my personal feelings about them. They're noisy, obnoxious, tend to go off at night, and are ...
17 votes
1 answer
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 ...
56 votes
3 answers
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....
20 votes
1 answer
9k 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 ...
11 votes
2 answers
32k 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 ...
7 votes
1 answer
636 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 ...
9 votes
1 answer
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 ...
0 votes
0 answers
27 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 ...
35 votes
1 answer
5k 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 ...
24 votes
2 answers
15k views

Are passengers inside cars protected from lightning because of the tires?

It's a common statement that passengers of a car are protected from lightening while inside because the car has rubber tires (which are insulators). An alternative theory often put forward is that ...
19 votes
1 answer
560 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 ...
8 votes
3 answers
307 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 ...
12 votes
1 answer
748 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'...
5 votes
0 answers
589 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 ...
3 votes
0 answers
316 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 ...
35 votes
3 answers
3k views

Did car and oil companies actively try to suppress electric cars' development?

According to some (e.g. the documentary film Who Killed the Electric Car?), car and oil companies have actively tried to suppress electric cars' development. Electric cars seem to have technological ...
3 votes
1 answer
777 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 ...
8 votes
1 answer
328 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 votes
1 answer
284 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 ...
13 votes
1 answer
3k 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 produce ...
14 votes
1 answer
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 ...
12 votes
1 answer
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 ...
8 votes
3 answers
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 ...
4 votes
0 answers
366 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. ...
18 votes
2 answers
6k 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 ...
3 votes
0 answers
485 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 votes
0 answers
117 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. ...
4 votes
3 answers
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 ...
25 votes
1 answer
11k 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 to ...
10 votes
1 answer
944 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 two ...
25 votes
3 answers
2k views

Why do we not have vehicles that meet or exceed the MPG ratings of vehicles that were available in the 1990s

I'm seeing some conspiracy theories making the rounds which claim that car-manufacturers are intentionally making cars that aren't as fuel efficient as they used to be. They often point to the Geo ...
22 votes
2 answers
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 ...
90 votes
3 answers
9k views

Does a car with a hybrid engine and Lithium batteries pollute more than a car with conventional technology?

You hear a lot of claims that, once you include manufacturing and battery replacement, hybrids pollute more than an efficient, more conventional engine. Are there any end-to-end studies measuring any ...
7 votes
2 answers
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 ...
5 votes
1 answer
19k 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 ...
18 votes
1 answer
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 ...