reconnaissance, map study, preli-minary survey and detailed survey

map study, preliminary survey, recon-naissance and detailed survey

map study, reconnaissance, prelimi-nary survey and detailed survey

preliminary survey, map study, recon-naissance and detailed survey

straight line

parabolic

elliptical

combination of straight and parabolic

1 in 30

1 in 36

1 in 48

1 in 60

total reaction time of driver

speed of vehicle

efficiency of brakes

all of these

slipping

skidding

turning

revolving