Its pretty simple to apply the turn signals they come with the harzards also once both setup + reverse lights,
looking at a lot of racing videos over the past months the real drivers do actually use these turn signals to allow faster cars to pass which makes sense,
anyways the settings are here.
[EMISSIVE_TURNSIGNAL_LEFT_0]
NAME=left_turnsignal
COLOR=100,225,25
LAG=0.2
SIMULATE_HEATING=0.3
LOCATION=REAR
[EMISSIVE_TURNSIGNAL_RIGHT_0]
NAME=right_turnsignal
COLOR=100,225,25
LAG=0.2
SIMULATE_HEATING=0.3
LOCATION=REAR
[LIGHT_TURNSIGNAL_LEFT_0] COLOR=1, 0.5, 0.1, 3
[LIGHT_TURNSIGNAL_RIGHT_0] COLOR=1, 0.5, 0.1, 3
[EMISSIVE_REVERSE_0]
NAME=LIGHT_REAR
COLOR=22, 22, 22
LAG=0.8
SIMULATE_HEATING=2.0
[EMISSIVE_REVERSE_1]
NAME=LIGHT_REAR_BULB
COLOR=2222, 2222, 2222
LAG=0.8
SIMULATE_HEATING=2.0