int32 aid
uint8 NULLSTATE=0

# lanechange
uint8 lanechange_state

# bilinker
uint8 steering_state
uint8 STR_LEFT=1
uint8 STR_RIGHT=2
uint8 STR_STRAIGHT=3
uint8 STR_BACK=4

uint8 accel_state

uint8 stop_state
# 1 is stopline, 2 is stop which can only be released manually.
uint8 TYPE_STOPLINE=1
uint8 TYPE_STOP=2

uint8 event_state
uint8 TYPE_EVENT_NULL = 0
uint8 TYPE_EVENT_GOAL = 1
uint8 TYPE_EVENT_MIDDLE_GOAL = 2
uint8 TYPE_EVENT_POSITION_STOP = 3
uint8 TYPE_EVENT_BUS_STOP = 4
uint8 TYPE_EVENT_PARKING = 5