* check LTA faults if using LTA
* add test
* add LTA_STATE
* add comment for 0 state
* why did test_models not catch this?
* code 21
* same behavior as LKA (only if LTA is used)
* common definitions!
* more comment
* revert LTA
* no lta here
* revert test
* no period
* -LTA
* init