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Questions tagged [road-vehicles]

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

4
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3answers
1k views

Is the Katy Freeway the widest in the world?

According to this source and several others (like Sylvester Turner, the mayor of Houston), a section of I-10 in West Houston called the Katy Freeway is the widest highway on Earth. Its widest point is ...
14
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2answers
521 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 ...
36
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1answer
77k 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. ...
3
votes
1answer
372 views

Does the Sion electric car solar cells provide enough charge for up to 30km travel per day?

Sonomotors have an electric car, the Sion. They claim that this car use its own solar-cells to charge the batteries in one day sufficient to drive up to 34km. Their information sheet says: Thus, ...
2
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1answer
523 views

Did Dr Ulrich Mellinghoff Suggest 140Km/h would be a safer limit on Australian roads?

The description below has been shared by the Facebook group Sensible Speed Limits Australia which claims that Dr Ulrich Mellinghoff suggested 140km/h would be a safer speed limit in Australia. ...
6
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1answer
657 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 ...
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, ...
50
votes
1answer
12k views

Did a Tesla car collide with a Russian robot?

This story made the rounds in the news: a Tesla car "killed" an autonomous robot in Las Vegas in January 2019. There is some controversy about whether the incident was a real accident or a ...
15
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1answer
847 views

Are car headlights getting brighter?

This news story in Popular Science asks whether car headlights are getting brighter and concludes they are not: So are headlights actually getting brighter? The short answer is no—although ...
14
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2answers
716 views

Is the apparent drop in insect deaths on windshields due to a decline in insect populations?

The "windshield phenomenon" is a term given to the anecdotal observation that people tend to find fewer insects smashed on the windscreens of their cars now compared to a decade or several decades ...
8
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1answer
1k 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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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") ...
28
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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 (...
20
votes
1answer
17k 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,...
3
votes
2answers
848 views

Is this accident footage authentic?

This video about texting and driving shows footage of a car crash. Many posters on YouTube claim that it is "obvious" that the crash is fake. It is not obvious to me either way. Is this footage ...
41
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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. ...
23
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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
votes
1answer
333 views

Do cars produce more emissions idling than when in motion? [closed]

The author of this article claims that Cars produce more emissions when idling than when in motion. This seems like a patently false statement. How could cars produce more emissions when idling ...
6
votes
1answer
398 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 ...
25
votes
3answers
8k 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
votes
1answer
2k views

What is the real history behind of the Ford GAA engine?

I have been searching for quite some time trying to find out if what I have heard is true with the history of how the Ford GAA engine came to be. (Note: this site has some errors, such as its ...
24
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2answers
13k 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 ...
11
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1answer
597 views

Is keyless theft/relay theft a practical threat for vehicles with fob/keyless entry?

Some sites, such as AutoExpress, are warning about a method of breaking into vehicles with keyless entry by capturing and relaying the fob's signal. To quote AutoExpress: The process criminals use ...
15
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1answer
975 views

Does one SUV tank of ethanol “take as much grain as could feed a person for a whole year?”

From The Great Transition, (c)2014, by Lester R. Brown (preface, page xiii): [F]illing the tank of a large SUV one time with ethanol takes as much grain as could feed a person for a whole year. ...
6
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0answers
682 views

“We have the right tires for your driving style.” [closed]

I saw an ad for a tire company today stating that they have the right tires for your driving style. When I buy tires I look for silent tires with long lifespan, good grip and most importantly a decent ...
10
votes
1answer
738 views

Are American standards on automotive turn signals demonstrably less safe than European ones?

In most countries outside North America, vehicles have separate turn signals which are amber rather than red. In the USA (and probably Canada) this is not part of the standards and a flashing brake ...
14
votes
1answer
5k 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" ...
90
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2answers
34k views

Are cars in Arizona melting in the 2018 summer heat?

Facebook just posted to my timeline this picture claiming that cars in Arizona are melting in the heat. Is it true?
18
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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 ...
1
vote
1answer
519 views

Do we have enough renewable energy for a humanity only using electrical cars? [closed]

One of my relatives claimed that electrical cars are overhyped and my relative somewhere read that we don't even have enough (renewable!) power to support a humanity in which only electrical cars are ...
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 ...
8
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0answers
1k views

Is filling multiple vehicles in one transaction at a gas station a safety hazard?

According to this gas station, pumping gasoline into more than one vehicle is a serious safety hazard: The gas station making this claim charges different customers different prices per gallon ...
11
votes
1answer
3k views

Is a tow truck driver killed every six days on average in the US?

Along I-90 in Massachusetts (and I presume elsewhere in the state), there is a digital billboard which sometimes displays a message from the Massachusetts Department of Transportation that a tow truck ...
10
votes
1answer
683 views

Do cars drop 7% in value every month?

In their email communication car-buying organization wijkopenautos.nl (wkda.de) claims cars drop 7% in value each month. Their exact claim is: Let op: een auto verliest iedere maand ongeveer 7% aan ...
5
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1answer
517 views

Can using heated car seats reduce fertility?

A family member warned me not to use heated car seats, since they cause infertility and cancer in both men and women. I searched the internet for a source for his claims and I found this Telegraph ...
7
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0answers
460 views

Do defensive driving courses reduce car accidents in teenage drivers?

A fairly common claim is that young learner drivers should take defensive driving courses so that they know what to do if they lose control of their car. This comes with the implications it will ...
115
votes
4answers
21k views

Does saying “sorry” after an accident count as legal admission of fault?

It is common knowledge that after a car accident (presumably other types too), one shouldn't say they are sorry to the other person. While probably intended as an expression of empathy, the claim is ...
2
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0answers
377 views

Is travelling by car better for preventing climate change than by plane?

From the Fairfax website traveller.com.au: Tourism and environmental damage: How travellers are ruining the world: Some friends of mine have stopped travelling. Pretty much, anyway. They're ...
41
votes
5answers
9k views

Does China control 85% of the supply of rare metals used in lithium batteries?

A selected letter in The Guardian talking about electric vehicles claims: The rare metals in lithium batteries are produced only in inconvenient places. More than 85% of the world’s supply comes ...
6
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2answers
615 views

Does E15 fuel damage cars newer than 2001?

Blogger David Woodsmall warns that E15 fuel (that is a blend of 15% ethanol and 85% gasoline) might be bad for some cars that are not certified to accept it: One of the chief complaints by E15 ...
44
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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 ...
22
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3answers
3k views

Do automobile manufacturers make parts wear out and break easily, just so they can make more money?

It is sometimes heard that automobile manufacturers design low-quality parts that wear out or break easily, so that they can make money on the repair or replacement of these parts. I believe this to ...
13
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2answers
1k views

Has Pokémon Go caused hundreds of deaths?

This article in The Register claims that Pokémon Go may have a bad side effect on road safety. The headline is: Pokémon GO caused hundreds of deaths, increased crashes And the article summarises ...
17
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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 ...
75
votes
4answers
24k views

Does the source code of the software for a high-end car contain on average around 100 million lines of code?

This infographic shows the different number of lines that some software applications (or a general type of them) have on average. The number of lines shown for an average modern high-end car strikes ...
8
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1answer
830 views

Did DUI fatalities increase or decrease due to legalization of marijuana?

I've seen conflicting articles claiming that DUI fatalities either increased or decreased after states legalized marijuana. Here are two samples, though there are many articles out there; "Since ...
3
votes
0answers
492 views

Does Tesla's 70 kWh battery have 63 kg of lithium and if so, why? [closed]

I have found information that Tesla's 70 kWh battery pack has 63 kg of lithium: https://electrek.co/2016/11/01/breakdown-raw-materials-tesla-batteries-possible-bottleneck/ Considering there's only 13 ...
2
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1answer
243 views

Is it best not to use Reg 85/86 petrol at an elevation in place of 87?

There seems to be quite an amount of confusion over whether or not it's necessary to follow the manuals and fill up with 87 gasolene even at an elevation where 86 and 85 petrol is being sold as ...
24
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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 ...
5
votes
1answer
507 views

Are Maryland's vehicle emissions tests a net benefit for the environment?

I am skeptical that vehicle emissions programs like Maryland's VEIP are a net win overall. You generate emissions by driving there in the first place, and idling while you wait your turn. Almost all ...