My car’s “smart cruise control” leaves what seems to be around a car length for every 10 mph, which is what I remember hearing in driving school. Feels a bit excessive in practice, but I also never feel like I’m being an asshole so I’m okay with it.
I was rear ended, HARD once. That distance gave me the space to control both my vehicle, and the one that hit me. It turned a potential multi car, multi lane pileup into a 2 vehicle wreck, either 1 more dinged car.
The space isn’t for the 99.999% of the time, but that 0.001% OH FUCK time.
I almost had that happen to me a year ago. Traffic had stopped on the interstate and I hear skrrt, skrrt, skrrt, skrrt getting closer and closer to me. I looked up in my mirror and see a Silverado rapidly closing the distance and thought “god damn it”. I fortunately left enough room between me and the car in front of me that I was able to give him some more space and turned a full on collision into a tap that didn’t do any damage. Pretty sure my foot was actually off the brake when he hit me and that helped absorb some of it as well. I was still pretty pissed though because I had more than enough time to think about all these things and consider moving onto the shoulder but I thought he would do that instead and still hit me with how fast he was going. Being an idiot, he did not and hit me anyway.
I’ve dodged similar collisions a couple of times, over the years. Unfortunately, this time, she didn’t even touch the brakes. I was hit with a 50 mph differential, and no warning whatsoever.
OH FUCK time.
I live for those moments
Do you wreck your car often?
Well you want the automated system to be overly safe usually. It is better than the other way around.
Having more space also gives the driver the to react.
I salute you good sir! That’s plenty of space to squeeze past if necessary 😁 Just maintain a constant speed and you’re a hero
And stay out of the passing lane.
Two car lengths? You absolute madman! That’s positively grotesque!
For the purposes of this comment, I’m assuming that cars are about fifty feet long.
Limo driver moment
At 60mph with a 2 second following distance, you’d need about 176 feet, so you’d want 3 car lengths with 50 foot cars.
I always heard “2 seconds of space” which is a lot more than a few car lengths, to give yourself time to react to both what’s in front of you and to the sides, and account for if their brakes perform better than yours. Two seconds of distance is a lot, though, and kind of impractical in traffic.
The recommendation changed from car lengths to seconds decades ago, but wasn’t well communicated fwict. I learned car lengths from my dad and then seconds when I got my motorcycle endorsement.
If everyone were leaving 2 seconds of space, it also reduces stop and go traffic that is caused, or at least exacerbated, by the traffic wave phenomenon. But that’s even less well socialized.
It’s a nice thought, but it has so many modifiers it’s pretty much worthless. Everything from road conditions, to time of day or night, to the size and weight and type of vehicle you are driving, to how old you are affects stopping distance and the interval you should be leaving.
Remember children - Driving should never be “relaxing.” It’s real work and demands your total concentration to protect yourself and everyone around you. So put the phone down and even turn off the radio. Put your head on a swivel like a fighter pilot. And have an escape plan for every inch you drive.
I don’t know why you are being downvoted since the distance from other cars should absolutely reflect the current conditions. I also agree that to drivers need to proactively look for possible collisions in mirrors and blind spots, though they should be generally calm and patient when driving.
Driving isn’t supposed to be as stressful as this comment put it. If it is then you shouldnt be allowed to drive.
I didn’t say it should be stressful, I said it should be “work.” There is a big difference.
When I leave two car lengths, four cars will go into it, and at least one of their drivers will throw a half empty beer can at me.
Infinite free beer exploit?
Only half infinite unfortunately
The simplified distance rule we learn in europe is: half your speed (km/h) in meters or as an equation, v/2000. E.g. you drive 120km/h, keep 60m distance.
In the US, usually it’s one car length per 10mph.
Probably not much more intuitive than yours, but less math required on the fly.
Tbh the math required is pretty similar, I just divide the speed by 2 and am done.
That’s very reasonable if you’re accustomed to operating in metric … Which we all should be, but here we are.
We all should be?
Ah, that could be interpreted at least two different ways. I have a suspicion of how this conversation will go, but I’m interested to find out.
It’s my opinion that the metric system is superior to the imperial, so we should all be primarily exposed to the superior system. Some may disagree and I won’t claim that I’m objectively correct. No worries if you disagree - regardless of my opinion, the imperial system is what I’ve been exposed to and what I use.
Alternatively, the statement might be interpreted as “you should be familiar with the metric system even if you reside in a country where it’s not the primary system.” That’s probably less true - while it might behoove one to be familiar with the metric system, I don’t blame the individual for the limitations placed on them by the government, regardless of what’s better.
If you have a third interpretation, it’s probably not what I meant, but I would be interested in hearing it.
Do European cars come with distance measuring equipment??
Many places have roads markers every 100m. Or you can count the seconds from any fixed point and figure it out.
No but humans typically do
Humans aren’t actually that good at visually measuring distances.
Only in cyberpunk literature.
“In the year 2147, technology has given humans abilities beyond the natural senses, it has given them… eyes.”
Eyes can’t measure distance. You can only make rough estimations.
I like my distance estimates the way i like my toilet paper
rough
I may not be good at giving it a number, but I can usually see how far apart two things are.
I just leave enough room to come to a stop in the gap between us.
That’s the underlying reason to keep distance ofc. The rule of thumb gives you an easy to calculate solution to how far that approximately is.
I don’t need math for this. Once you have a feel for your car you can just visually gauge it in an instant.
Judging by how close people follow me on the Interstate, I have a feeling most drivers think this but only a small percentage can do it effectively.
And judging by how close 9 out of 10 pickup truck drivers
followtailgate me on the interstate even when I am doing 10-15 over, I have a feeling most don’t care and would prefer to run me over in their lifted Rams and SuperDutys.
I’ve always preferred the 2 second rule. You don’t need to do distance math in your head, just find a tree and count the time it takes to get from their car to yours.
In my country it’s 3 seconds out of town and 2 seconds in town, by law. And I think that’s beautiful.
In France the way we learned is (for the highway at least)
- 110km/h: 5 small markings between you and the other car
- 130km/h: 2 large markings
yeah me too. i get a lot of rollerskaters squeezing into the space so i keep backing off til theyre all jammed ass to mouth like a human centipede. gotta keep my distance for when the chain binds. and it will
I have a two lane road for most of commute every morning. What hate is when you pick up a buttplug. A buttplug is some dipshit who crawls up your ass and refuses to pass. They wont leave enough gap for the person behind them to pass without passing both of us and they wont pass themselves.
What is crazy about this is that person will usually stay there until every car behind them has passed. After that they usually pass almost immediately.
In my experience, slowing down to just below the speed limit will usually irritate these tailgators enough to shake them off. Your mileage may vary though.
This is the way. Though I’ve had to come to a full stop and pull off the road a couple times…
I’ve always followed the rule of 1 car length for every 10 miles per hour you’re going.
How am I supposed to leave 10 car lengths while speeding through a school zone? Explain!
If it’s a school zone you leave 10 school bus lengths.
I always (sometimes) do three seconds between me and the car in front of me. That automatically adjusts for increased speed.
When I did driver’s training, they recommended about 2 seconds of distance. I find it to be a reasonable distance most of the time.
2 seconds is not enough. Average human reaction time takes more than half that time. I was also taught to keep 3 seconds minimum distance on average 80 km/h zone. Faster driving, more distance should be kept.
3 seconds when under 65. 5 seconds when it’s raining or I’m moving faster than posted highway speeds. It pisses people off but I’m hauling a ton of steel and plastic around, I’m not going to risk my life and everyone’s around me just because some guy is late for work or can’t be patient and needs to get where he’s going a few seconds before me. People tend to lose the reality of the situation when driving their super fast metal explosion machines.
Should be at least 5 car lengths on the highway
Lord I hate those fucking cunts who see two car lengths of space as an invitation. I’m going 85, you’re going 75, don’t suddenly hop in front of me because the clown in front of you is going 70.
You can’t do this in LA, but LA fucking sucks so fuck 'em haha.
I think my biggest pet peeve about driving is when you come to a stop and the car behind you tries to shove their nose up your ass. Like bruh you don’t need to ever be that close
My driving instructor taught me that I should still be able to see the other car’s back wheels when I stop. I actually don’t know how close that looks from the other driver’s perspective.
What it looks like:
Not actually as the “see the tires” rule is fairly good advise. Keep in mind sometimes it is smarter to give a little more space depending on the situation. Think of it as more of a minimum. Also lose most of your speed farther back and then role forward. This allows for recovery time in case of failure or loss of traction.
Terrible, terrible advice. That leaves a full car-length of empty pavement with the driver sight-lines of modern SUV and crossover designs. Pickup trucks are worse; I’ve seen pickup truck drivers stop a full 30 feet back. It wastes huge amounts of space on the street, and causes traffic congestion. On the other side of the coin, van and bus drivers can still get right up on your ass when following this advice.
I hate breathing in pollution so I keep a car’s length between me and the next car at traffic lights. Cars themselves are a huge storming waste of space and I hate being in or around cars with all my heart and soul so if I make traffic worse then I will consider it a passive form of protesting against car dependency
Maybe they just really love the smell of exhaust and are trying to get high off of your emissions
Then get out and suck my tailpipe but stay off my ass lmao
At a stop? Who cares? Can’t being closer together at a stop light at least help with intersections? I guess it depends on the city.
If you’re driving a manual and you roll back on a stop, you shouldn’t be driving a manual. Unless you live in like San Francisco I guess? In the Appalachian region, cops will stop you for rolling back.
Ever heard of clear distance? If you’re at a stop and someone rear ends you and you hit the car in front of you you are at fault and will be held liable.
As for the rollback in my state they’ll again look at distance. Because if I don’t have enough space to back up because you’re too close you’re once again at fault for not having clear distance.
On top of all that it helps move traffic along faster. You don’t have to wait as long to accelerate if you maintain distance because you don’t have to wait for the car in front of you to move far enough to start accelerating.
Getting bumper to bumper has zero benefits outside of the false psychological feeling of forward progress.
Id get that close if I want to give the phone enjoyer behind me plenty of time to stop
So you can hit the car in front of you too?
It’s not only a safety hazard but it leads to slower traffic. If you maintain the right distance at a stop the whole line of cars can accelerate faster because you don’t have to wait as long for the car ahead of you to move. There are zero actual benefits of sniffing my ass at a stop.
phone enjoyer is ungovernable
That doesn’t mean you should be acting like an asshat yourself.
It takes two to tango
calm down
Weird guy is right though. Best practice is to leave enough space so that in the event you get rear ended you don’t get shoved into the car in front of you.
fair point
if they are following the two second rule they should be less than a foot from your car. If your car is stopped you are always more than two seconds from the car in front of you.
Never heard of that rule. I was always taught to leave enough space that you can see the bottom of their back tires.
The two second rule is for following distance. Applying it to stopped cars makes no sense at all, but it is funny . You have it right.
Ah I misunderstood. I understand it now.
I leave enough space to be able to drive around them if I need to
I can’t believe this comedy gold is not upvoted more. Maybe it needs /s?
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I drive a 6 speed. This is where my rage for this comes from.
But even in automatics rollback isn’t uncommon on an incline.
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I feel like it really isn’t your fault if you role back 6 inches and hit them. If you were to roll back 4 feet it would be different but in this case you can’t control something so small.
In court it won’t be your fault if they’re that close, but it’s still the hassle of dealing with people who don’t understand basic driving etiquette.
If you’re only two lengths away from the car in front of you while driving at highway speeds, you are tailgating. Back off. It’s far more dangerous than speeding.
Help me out with this, because it’s driving me crazy. Whenever I leave anywhere close to 2 seconds between me and the car on front of me, someone cuts in, and I’m now too close to them, so I slow down, leaving a 2 second gap, and another cuts in. Rinse, repeat. I end up being the slow ass that everyone keeps zooming around unless I tailgate.
It just be that way. Idiots will see your safe following distance as their opportunity to switch lanes. Just keep being the safe one.
Truckers call it the Idiot Space.
Because idiots think it’s for them.
Just be safe. You’re still close to your desires speed
Just… Don’t care? Let people in and adjust the distance with them. Driving is an involved process, get a car with adaptive cruise control if you want one that will do exactly that for you.
I guess it’s more than just “caring” - I feel that we’d all be a lot safer if we were all going the same speed instead of inviting people to dodge in and out
It would be safer if we were all riding the train/bus. Getting in a car in america is accepting the risk that you share the road with everyone. no matter the qualifications or mental state we still all gotta get to work/grocery store/wherever, and the only way is by ~4000 pound metal speed box.
Worrying about safety on the highway is about making sure you are in situations you can handle and react to, staying attentive to the styles and mental states of other drivers and being a step ahead of the road conditions
Unfortunately I can’t see how public transport would be feasible without accepting that the vast majority of places I might want to go are simply inaccessible, and the places I could go would take 3-5 times longer. Case in point, there are no public transportation options to get to my son’s high school. It would be a 35 minute bicycle ride. I can drive there in 12 minutes. Getting to my local Wegmans would take 37 minutes by bus. I can drive there in 9 minutes. I live on the outskirts of a medium size city on the east coast in a low density residential neighborhood.
But people need to change lane sometimes and if you’re the one giving them the space to do so then more power to you, don’t complain
Let them hop in and keep your 2 seconds. I used to have a 40 minute commute and on a busy morning would have 10-15 people do that. Know how much time that sets me back? 20 to 30 seconds. Following this rule I have a 25 year clean driving record and I guarantee these lane hoppers can’t make that claim
it’s probably even less, maybe even negligible because of traffic lights at either end: you can’t calculate a single journey because you’re never going to hit the same light exactly the same every time. I have four lights between my house and the freeway, and 7 between the freeway and one of the sites for my job. Each one adds between 0-60 seconds randomly for an average of 6 minutes sitting and waiting per day. I would have to have a commute of like 120 miles of uninterrupted freeway driving for that to matter.
Beyond “don’t care” - you get to be the traffic hacker who improves traffic for everyone. yayyy
Credit for above I think: Traffic Waves
Anyone who wants to test how this can work?
Check this old-school site:
At 65mph, you cover two car lengths (~30 ft) in about 1/3 of a second.
Typically human reaction time for braking is about 1.5 seconds.
If something went seriously wrong in front of you (like a sideways car, or a hidden obstacle in front of the car in front of you) you would have covered 10 car lengths before your foot touches the brake pedal.
