level crossing

no parking

end of speed limit

overtaking prohibited

regulatory sign

warning sign

informatory sign

none of the above

simultaneous system

alternate system

flexible progressive system

simple progressive system

reduces right angled and rear end collisions

increases right angled and rear end collisions

reduces right angled collisions but may increase rear end collisions

reduces rear end collisions but may increase right angled collisions

Stop or red time of a signal is the sum of go and clearance intervals for the cross flow.

Go or green time of a signal is the sum of stop and clearance intervals for the cross flow.

Clearance time is generally 3 to 5 seconds.

The cycle length is normally 40 to 60 seconds for two phase signals.