Approaching stopped traffic with Adaptive Cruise Control active

[PhoenixAir]

New owner, first post, I have several things to post but will start here.

When using ACC in the city it all works pretty
great with one big exception. When approaching a car stopped ahead in your lane (usually at a red light, traveling reasonably fast 50-55 mph) it takes much too long for the ACC to pick up the stopped car and start applying the brakes. If you have nerves of steel, you can wait and it will stop, usually very aggressively, but it is really hard to have those nerves.

It is particularly bad when it is 2 or 3 lanes wide and your lane has less cars than the other two. You end up screaming past the cars on the left or right before ACC applies the brakes.

It does appear there is a correlation between the 3D visual traffic display showing the vehicle and the awareness there is a car stopped. So the limitation is either the lidar/radar distance sensor range or the software just not reacting fast enough to the stopped car. Hopefully the latter and it can be adjusted.

 

[HC_79]

I think it will continue to improve over time but yes, it can sometimes be a little aggressive on the braking. For me it’s inconsistent though, sometimes it’s flawless and brakes as anyone normally would and other times in similar traffic scenarios I’m like “are you going to stop, are you going to stop”. It always does though.

Hence why it’s classed as a Level 2 system and needs to have an attentive driver at all times.

 

[knewman]

Still haven't found a vehicle that has an ACC system I trust in that kind of scenario. At least the Air has a comfortable system, never jerky accel/decel like most other cars.

 

[Alex]

When approaching a car stopped ahead in your lane (usually at a red light, traveling reasonably fast 50-55 mph) it takes much too long for the ACC to pick up the stopped car and start applying the brakes. If you have nerves of steel, you can wait and it will stop, usually very aggressively, but it is really hard to have those nerves.

This has been a problem since day 1 and I have always complained about this. It has improved ‘dramatically’ recently with the Highway Assist improvements. I often still get “Brake Now" warnings in the city, especially when the lead car is stopped and the approaching angle (horizontal/vertical) is not perfectly aligned. You would think the car would honor its own warnings. It also fails miserably when approaching stopped vehicles which are around a curve.

Still haven't found a vehicle that has an ACC system I trust in that kind of scenario. At least the Air has a comfortable system, never jerky accel/decel like most other cars.

Not for me. Even the older Tesla autopilot system, which only uses cameras, works better (also, the latest Tesla FSD system has never let me down)

 

[PhoenixAir]

This has been a problem since day 1 and I have always complained about this. It has improved ‘dramatically’ recently with the Highway Assist improvements. I often still get “Brake Now" warnings in the city, especially when the lead car is stopped and the approaching angle (horizontal/vertical) is not perfectly aligned. You would think the car would honor its own warnings. It also fails miserably when approaching stopped vehicles which are around a curve.

Not for me. Even the older Tesla autopilot system, which only uses cameras, works better (also, the latest Tesla FSD system has never let me down)

Agreed. Most modern cars today have ACC and handle this much better. This is what I would call a bug, either hardware, the sensors don’t have enough distance ability (at which point they should be using the Tesla model of imaging) or software, the monitoring loop is depending on the subsystem that manages the 3D display for a message if there is a car up there which is very poor design. I have been managing complex software projects my whole career, this is an area that needs attention.

Lucid…please Take a look!