Driver Errors

Every lap, each driver has a small chance of making a mistake. These are not crashes — just small errors that cost a tenth or two. How errors work:

Base error chance: ~4% per lap
Modified by driver skills:

- Pace: higher pace = more errors (pushing the limit) - Racecraft: reduces error rate (better car positioning) - Technical: reduces error rate (smoother inputs)

Tyre wear heavily influences error rate — worn tyres (below 40% health) significantly increase the chance of mistakes
Time loss: 0.1–0.7s per error (small and not race-ending)

Error examples:

Runs wide at the exit, losing momentum
Misses the apex, compromising the exit
A small lock-up sends them wide
Overcooks the entry and has to back out
A small snap of oversteer costs time
Struggles for grip with worn tyres and runs wide

Errors are logged as driver_error incidents in the race feed.

Yellow Flags

When a driver makes an error, there is a 20% chance it triggers a local yellow flag for one lap. Minor solo crashes have a 30% chance of triggering a yellow flag. Yellow flag rules:

Lasts exactly 1 lap
Overtaking is prohibited
No speed penalty (unlike a full Safety Car)
Designed to simulate local marshalling / debris clearance

Yellow flags are logged as yellow_flag incidents. If a yellow flag is active and an overtake would have happened, it is suppressed.

Crashes

Crashes now come in two types:

= Solo Crashes (≈65% of all crashes)

= A driver can crash entirely on their own — no other car involved. This is the most common type of crash in GT3 racing, accounting for roughly two-thirds of all incidents. How solo crashes work:

Base chance: ~0.35% per lap
Pace increases crash risk (pushing too hard)
Racecraft reduces crash risk (better car control)
Technical reduces crash risk (smoother inputs, better feel)
Damaged cars are significantly more likely to crash again
Lap 1 is excluded from solo crash checks

Severity levels:

Severity	Score	Damage	DNF Chance	Example Description
Minor	<35	8–25%	0%	Loses the rear through the high-speed right-hander and spins into the barrier
Moderate	35–59	25–55%	15%	A sudden loss of rear grip at the fast sweeper puts them hard into the wall
Severe	60–81	55–90%	100%	A high-speed moment through the flat-out section ends with a heavy impact
Catastrophic	82+	100%	100%	The car gets loose under braking and spears head-on into the wall

Severity is influenced by driver skill — high Technical and Racecraft reduce the roll modifier.

Multi-Car Crashes (≈35% of all crashes)

These happen when an overtake attempt goes wrong. When a following driver tries to pass and fails, there is a chance of contact. Multi-car crash descriptions (GT3 style, no wheel-touching):

They make contact at the apex, sending both cars wide
The trailing car gets squeezed onto the kerb and loses control
A clumsy move under braking results in a collision
Late braking forces them both off track with contact
They go side by side through the corner and run out of room
A late dive down the inside leaves nowhere to go
The gap closes and they touch, sending one car around
Caught out by a sudden lift from the car ahead, they rear-end them
Fighting tooth and nail through the complex, they eventually touch
A drag race to the line turns sour as they make contact

Severity and Safety Car deployment follow the existing system (minor → no SC, moderate → 2 lap SC, severe → 3 lap SC, catastrophic → 4 lap SC).

Summary of Changes

Feature	Description
Driver Errors	Per-lap small mistake chance (1–18%), influenced by Pace/Racecraft/Technical + tyre wear
Yellow Flags	1-lap local caution from errors/minor solo crashes — no overtaking allowed
Solo Crashes	~0.35%/lap base chance, 4 severity levels, accounts for ~65% of all crashes
Multi-Car Crashes	22 unique GT3-style descriptions, no wheel-touching references
Tyre Wear Link	Worn tyres increase error rate (up to 3.5× at 0% health)