Open Map Chest Displayed Speed Limits

if the speed limit database Open Chest Maps uses is any more accurate than than the one used by Garmin.

Around here anyway, the Garmin speed limits are wrong 25-30% of the time

The speed limits are the only thing with garmins that are all over the place. 60% of the time they aren't there and when they are they wrong haha....

Blame the source then. Garmin's US and Canada maps are based off data from Here, who gets their data from the states and provinces as well as from users. Here does have means of allowing map data to be changed if you have an editor account with them.

We shouldn't be blindly following the GPS's speed limit indications in any case.

This made me wonder how Tesla deals with this in their FSD (Full Self Driving) mode, so I Googled it and got this response.

Tesla Full Self-Driving (Supervised) (FSD) manages speed limits by combining map data with real-time camera detection of speed limit signs. It offers profiles (Chill, Standard, Hurry, Mad Max) that determine, along with user-set offsets, how far above or below the limit the car will travel, with "Mad Max" allowing higher speeds.

Speed Limit Management Features
Speed Profiles:
Sloth: Drives at or below the speed limit.
Chill: Slower, more conservative driving.
Standard: Matches the speed of traffic.
Hurry/Mad Max: More frequent lane changes and higher speeds (up to 85 mph).
Automatic Set Speed Offset: FSD can automatically adjust to speeds slightly higher than the posted limit based on traffic, road conditions, and user settings.
Adjustments: Drivers can set an "absolute" limit (20-140 mph) or a "relative" offset (+/- speed).
Traffic Awareness: If the system detects vehicles moving significantly slower, it may reduce speed, according to the Model 3 Manual.

Limitations and Safety Warnings
Reduced Capability: FSD may not fully recognize speed limits in poor lighting, bad weather, or with obstructed cameras.
"Mad Max" Controversy: The "Mad Max" mode has garnered scrutiny for exceeding local limits and driving fast (e.g., 85 mph in 65 mph zones).

Speed Limit Detection Issues: FSD may sometimes rely on outdated map data or fail to recognize temporary changes like construction zones.
Mandatory Supervision: The driver is responsible for maintaining a safe speed, even with FSD engaged.

You can manage these settings, including selecting driving profiles and setting offsets, within the Autopilot settings on your Tesla vehicle display

If a self driving cab or Uber is pulled over for speeding, who gets the ticket?

Come to think of it, how do cops actually pull over a self driving vehicle?

According to AI, there are various procedures that vary by state, but no universal standard.

An interesting article on the subject:

https://www.trafficsafetystore.com/blog/how-do-police-pull-o...

One statement made by AI is a bit disturbing. In some jurisdictions, the occupant of the vehicle is responsible even if they are not behind the wheel??

I wonder how it deals with construction speed zones where the resume sign is missing. Be driving at 30 mph long after the construction zone is past.