autonomous vehicle lane

Johno100

grade15 wrote: »

2) if 1/3 of vehicles were autonomous then they will be using one lane, so the remaining lanes is enough for normal vehicles!

Well we're a long way off that aren't we? Your OP was written as if this was something you wanted implementing immediately.

Johno100

[quote=[Deleted User];74380503]Surely just "a bit closer". At 70 mph the thinking distance (which would not be needed) is 21 metres, but that still leaves a braking distance of 75 meters.[/QUOTE]

If the eventual aim is that all vehicles will 'talk' to each other then theoretically they'll be able to sense when the vehicle in front is braking and adjust their speed and gap accordingly.

Car_54

Johno100 wrote: »

If the eventual aim is that all vehicles will 'talk' to each other then theoretically they'll be able to sense when the vehicle in front is braking and adjust their speed and gap accordingly.

Fine, but what if the one in front stops or slows rapidly without braking, i.e. collides with something?

redux

Let's wait some time, at least until well beyond when such cars have become safer.

At the moment there are hardly any cars, and the fatal accident rate of cars with such aids is significantly higher when it is one in a few hundred than a couple of thousand in twenty million.

Topically, it turns out the NTSB has just released the preliminary report for a recent accident.

A preliminary review of the recorded performance data showed the following:

The Autopilot system was engaged on four separate occasions during the 32-minute trip, including a continuous operation for the last 18 minutes 55 seconds prior to the crash.

During the 18-minute 55-second segment, the vehicle provided two visual alerts and one auditory alert for the driver to place his hands on the steering wheel.

These alerts were made more than 15 minutes prior to the crash.

During the 60 seconds prior to the crash, the driver's hands were detected on the steering wheel on three separate occasions, for a total of 34 seconds; for the last 6 seconds prior to the crash, the vehicle did not detect the driver's hands on the steering wheel.

At 8 seconds prior to the crash, the Tesla was following a lead vehicle and was traveling about 65 mph.

At 7 seconds prior to the crash, the Tesla began a left steering movement while following a lead vehicle.

At 4 seconds prior to the crash, the Tesla was no longer following a lead vehicle.

At 3 seconds prior to the crash and up to the time of impact with the crash attenuator, the Tesla's speed increased from 62 to 70.8 mph, with no precrash braking or evasive steering movement detected.

https://www.ntsb.gov/investigations/AccidentReports/Pages/HWY18FH011-preliminary.aspx

unholyangel

grade15 wrote: »

we have cycle, bus and pedestrian lane, but it would give a chance for everyone to get familiar with autonomous vehicles...


but you do have a point!

On motorways?

forgotmyname wrote: »

With the accident rate increasing with autonomous cars, are they really safe to let out in public?

Maybe realease on a a care in the community basis?

I wonder what all those that said the accident rate in them was very low will say now?

Yes on closed road tests and short drive around the blocks where there is very little traffic. But it seems they still have major issues.

Accident rate is climbing.

If you're referring to the low speed accidents with the cars they've been trialling....I believe those accidents were caused by driver error of the other car (which was not autonomous) because they didn't expect the autonomous vehicle to drive so safely and properly.



[quote=[Deleted User];74380503]Surely just "a bit closer". At 70 mph the thinking distance (which would not be needed) is 21 metres, but that still leaves a braking distance of 75 meters.
[/QUOTE]

I'm maybe not going to explain this very clearly but the car in front won't come to an immediate stop, it will have a braking distance too. If you have cars that are all autonomous (and can communicate with each other) then theoretically you could have near bumper to bumper traffic.

In the trials they've been doing, they've had them travelling 20ft apart when going speeds that are more than 80ft per second - so about a quarter of a second apart.

boliston

There would need to be some sort of physical barrier as there is no way they would easily be able to stop non autonomous vehicles going into the lane. Anyway why should they have their own lane as they are not any more environmentally friendly that an human driven electric vehicle? Normally dedicated lanes are offered when there is some benefit like car pooling etc when an autonomous vehicle could still just have one occupant.

forgotmyname

unholyangel wrote: »

On motorways?

If you're referring to the low speed accidents with the cars they've been trialling....I believe those accidents were caused by driver error of the other car (which was not autonomous) because they didn't expect the autonomous vehicle to drive so safely and properly.

No, I am talking about the cyclist that was killed by the uber self drive vehicle in Phoenix, and the other incident where a cyclist was injured in San Francisco.

Tesla driver killed in Arizona a few months back, hit the concrete barrier.

Tesla claim's that its an assisant and not a 100% self drive. Why does it not deactivate when your hands are not on the wheel or when the driver actually leaves the driving seat?

Driver banned recently for getting into the passenger seat on the motorway, whilst moving.

AdrianC

unholyangel wrote: »

I'm maybe not going to explain this very clearly but the car in front won't come to an immediate stop, it will have a braking distance too.

Which is lovely, right up until the car in front DOES come to a sudden stop... because there's a cartoon safe been dropped off a bridge right in front of it. Or an articulated wagon has crossed over the central reservation. Or the car in front suddenly swerved around a free-range HGV wheel which is now unavoidable. Or the car in front... well, any of a million scenarios.

Johno100

forgotmyname wrote: »

No, I am talking about the cyclist that was killed by the uber self drive vehicle in Phoenix, and the other incident where a cyclist was injured in San Francisco.

With that one I still haven't seen any evidence that a human driver, even with the reactions of an F1 driver would have avoided the collision. That raises the question, should we hold autonomous vehicles to the same or higher standards than vehicles being controlled by humans?

forgotmyname wrote: »

Driver banned recently for getting into the passenger seat on the motorway, whilst moving.

To be fair that wasn't part of any trial and nobody was injured as a result of his actions.

forgotmyname

Johno100 wrote: »

With that one I still haven't seen any evidence that a human driver, even with the reactions of an F1 driver would have avoided the collision. That raises the question, should we hold autonomous vehicles to the same or higher standards than vehicles being controlled by humans?

Youtubers and news channels have been to the location and showed the area to be a lot brighter than the original dashcam footage, the sensors detected an object 6 seconds before the impact.. Then fractions of a second later its a moving object then its a bicycle and that emergency braking was required. But they disabled the braking because they didnt trust the system. What does that tell you? The car knew it needed to brake but they disabled it and it did not warn the driver either.

To be fair that wasn't part of any trial and nobody was injured as a result of his actions.

Correct, nobody hurt or injured in that. But how can they claim the system is not 100% self drive and that the driver must be in control. When the driver clearly wasnt in control. The system knows if the driver is holding the wheel so why does it not pull over?

Watch some of the Tesla video's, one of them braked quite sharply on a fairly decent 2 way road because it detected pedestrians.
You could see the onboard embedded display have a panic which caused it to brake sharply.

Its clever, but its not ready yet. Electric shuttle bus like trams, its where its at currently. Give them a town to drive around with no other traffic and at slow speeds.

Did the self drive race cars fail to do one lap before crashing into each other?