ID number of items	Item content	Mean (SD)	Factor loading
Factor 1	Errors by bus drivers (α = 0.75, Aiic = 0.51, Ev = 30%)	2.09 (0.69)
MP1	Make a hard braking or sudden deceleration to avoid collision when a motorcycle is abruptly swerving right in front	2.55 (0.95)	0.48
MP2	Distracted or preoccupied, realize belatedly that the vehicle ahead has slowed, and have to slam on the brakes to avoid a collision	2.04 (0.82)	1.01
MP3	Try to overtake without first checking your mirror, and then get hooted at by the vehicle behind which has already begun its overtaking maneuver	1.69 (0.78)	0.6
Factor 2	Lapses by bus drivers (α = 0.88, Aiic = 0.71, Ev = 35%)	1.63 (0.67)
MP7	Fail to notice someone going the wrong way until it is nearly too late, and make a hard brake or lane change	1.63 (0.77)	0.83
MP8	Fail to notice vehicles parking illegally on the street or an obstacle up ahead on street until it is nearly too late, and make a hard brake or lane change	1.63 (0.74)	0.81
MP10	Fail to notice someone crossing illegally until it is nearly too late, and make a hard brake or lane change	1.62 (0.72)	0.77
ID number of items	Eliminated items	Reason for elimination
MP4	Try to overtake without first checking your mirror, then make the vehicles behind changing speed or lane, stopping, falling, or even making crashes	Had low score
MP12	Fail to turn on blinkers when entering or leaving bus stops	Had low score
MP13	Turn on wrong blinkers when entering (turning left blinker) and leaving (turning right blinkers) bus stops	Had low score
MP5	Misjudge speed of oncoming vehicle when overtaking	Did not match target factor
MP6	Fail to notice someone stepping out from behind a bus or parked vehicle until it is nearly too late, and make a hard brake or lane change	Did not match target factor
MP9	Fail to check your mirror before pulling out, changing lanes, turning	Did not match target factor
MP11	Brake too quickly on a slippery road and/or steer the wrong way in a skid	Did not match target factor