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Waymo restricted their comparison to human benchmarks for their two major operating areas: San Francisco, CA, and Phoenix, AZ.
Very limited trials, in a very limited area.
Nothing like a fleet of smart trucks or cars.
-John
Well that is when you are driving. One car length per every 10 miles per hour.Originally Posted by def90
People today are leaving multiple car lengths while stopped at at stop sign/light.
I think they are doing this, so they can go read their text messages, but for all I know drivers ed is teaching them this *expletive*
-John
If you are stopped at a stop sign/light, snuggle up to the car in front of you. This allows more people to get through the next light cycle, etc. There may be others behind you looking to get in the right or left turn lanes, that you are BLOCKING by leaving a large gap between you and the car in front of you.
-John
Hell no. I was always taught to leave enough room where (in a standard car) you can see 2' of pavement behind the rear tire of the vehicle in front of you. By doing this, unless someone totally smashes into you from behind, you should be able to avoid running into that car if you get rear ended. In CO, it doesn't matter who caused the wreck, if you get pushed into the car in front of you, YOUR insurance has to pay for the car in front of you.
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"You can't spell genius without Ginsue." -Ray1970, Apr 2020
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Wear a seatbelt even when stopped
I like to be able to see the tire tread of the vehicle in front of me. Something they taught us at an Air Force driving class. And that was 49 years ago...
Per Ardua ad Astra
This is as I feared. Some people believe more distance is a right/safe distance. Is this being taught? Is it in the drivers education manual?
Inquiring minds want to know...
-John
Oh they are teaching this!
Stopping: Come to a complete stop, no forward motion of the vehicle. Do not encroach over the stop line and, crosswalk; keep the vehicle’s wheels pointed straight ahead while stopped, do not turn the wheels until beginning to make the turn and maintain an adequate distance between vehicles (If you can see the rear wheels touching the ground of the vehicle in front of you, you are at an adequate distance).
https://dmv.colorado.gov/sites/dmv/f...37_Jan2025.pdf
Has anyone done the physics? How much space are they recommending/teaching here? For stopped cars, at an intersection?!
-John
Last edited by arbol; 05-09-2025 at 15:59.
I'm going to take a stab at this.
...maintain an adequate distance between vehicles (If you can see the rear wheels touching the ground of the vehicle in front of you, you are at an adequate distance).
Lessons cost money. Good ones cost lots. -Tony Beets
I was taught 1 car length per 10 mph but if I observe that here in Colorado, some nimrod inevitably inserts himself in between me and the car in front of me so I end up with a half car length.
I took a look today, as I drove up to a person stopped in front of me, and where I would need to stop to see their rear wheels touching the ground, versus where I actually stopped, snuggling up to them, and it looks to me like this wastes at least 10 feet, if not more, per car.
As I know you care very much about the environment, etc., that means fewer cars through the stop sign, just sitting there, idling.
Does it help safety? No, because if you are going to be rear-ended, it does not normally matter where the cars in front of you are.
All this practice achieves, is pissing off other drivers, making them miss the light, and blocking them from the turn lane.
-John
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