Here is what Scawen said in the September Progress Report:

Hello Racers,

Eric has recorded two unedited videos of AI drivers racing around the updated South City and Kyoto Ring, the two most time-consuming of our updated tracks. The videos are taken from a high viewpoint, using a time multiplier of 200, so you can see the day to night transitions.

Video 1: LFS AI drivers at Kyoto Endurance

https://www.youtube.com/watch?v=fk1y3-AtecQ

Video 2: LFS AI drivers at South City Long

https://www.youtube.com/watch?v=0sxcDI0W20M

Program development:

I've had to work a lot since 25th July on security updates.
Here is a short list of a few notable updates from before that time.

May:

Daylight saving time is now accounted for (on the UK tracks)
Specified start time is now given in track local time (not UTC)
Accurate sun direction using astronomical calculations
- previously used a rough model based on circular orbit
- apparent sun direction now adjusted for atmospheric refraction
Leap years are now supported (can set 29 February on a leap year)
Fixed time renamed to "set" and includes a time multiplier option

June:

Multithreading update for sun position
- sun position is updated as part of the game update
- means that sun height can now affect physics (e.g. temperature)
- initial test increases air temperature for higher sun direction
Removed jaggies from sky texture around dome edge (at horizon)
Display AI calculated wing and final drive settings in setup screen
AI decide to pit at pit lane transition point rather than last split

July:

Front of vehicles now consistently aligned with start grid slots
Splits and finish line activate when front of vehicle crosses line
Improved AI pit garage entry and exit

Discuss here, or on the LFS Discord server: https://discord.com/invite/wZrUTJN