TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM FOR EMERGENCY VEHICLES

Question 1

TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM

Los Angeles Fire Department (LAFD) in collaboration with the Los Angeles Department of Transportation (LADOT) has developed a system that automatically turns traffic lights green for emergency vehicles traveling on designated streets in the City.

Will:

Reduce response times

Improve public safety

Answer 1

reference

Question 2

TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM

Preemption causes the traffic signal to immediately begin clearing pedestrians from all crosswalks with flashing “DON’T WALK” indications.

Answer 2

reference

Question 3

TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM

Each emergency vehicle is outfitted with a radio transponder which broadcasts a unique signal dedicated to the shop number of each apparatus that is detected by low voltage loop system embedded in the roadway just before crosswalks.

Answer 3

reference

Question 4

TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM

An indication that the system is working properly is that the “DON’T WALK” indicator will flash in all four directions.

Answer 4

reference

Question 5

TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM

Apparatus must hit at least ___ loops (street lights), to activate priority system.

Answer 5

two

Question 6

TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM

System is active until apparatus turns off designated route and then two loops must be tripped again in order to continue with preemption.

Apparatus must not exceed posted speed limit. It will defeat software and red lights will be encountered.

Answer 6

reference

Question 7

TB 133 TRAFFIC SIGNAL PREEMPTION SYSTEM

Maintenance - transponder should be checked on _____ morning for mounting and wire status.

Answer 7

Monday