answersLogoWhite

0

Some have sensors which will indicate that a car is at the intersection, some have pressure plates at the intersection which detects the weight of a vehicle on it, some are just timed.

User Avatar

Wiki User

9y ago

What else can I help you with?

Related Questions

Can you get in trouble for having red and blue lights on your car?

You can only have red lights on the rear of your car. And blue lights are illegal to use on any car on the street they are only for emergency vehicles blue lights are for police only


What does the red car on the dashboard signify?

red lights are critical lights. may be a door open or loose or may be something serious. what type of car is it?


What lights do police put on when they are responding an emergency?

Locally to me, the blue bar on the top of the car flashes (in some other states, I believe police use red lights, or red and blue) the headlights flash and the tail lights flash.


What color are the reverse lights on a car?

White.


Did traffic lights change. i seem to remember them being green on top and red on the bottom.?

The lights are still in this order: RED YELLOW GREEN


When the foot brake is pressed which must come on?

The red ones in the rear of the car. Note: They are separate from and next to the red lights that are on constantly when you turn your head lights on.


Which light must come on when the foot brake is pressed?

The red ones in the rear of the car. Note: They are separate from and next to the red lights that are on constantly when you turn your head lights on.


Some red traffic signals change only when a car is at the stop line?

Some red traffic signals use vehicle detection systems, such as inductive loop sensors, which activate when a car is positioned at the stop line. These sensors ensure that the signal only changes when a vehicle is present, reducing unnecessary delays for vehicles at intersections. This technology helps improve traffic flow and minimizes waiting times for drivers who are stopped at red lights.


When driving behind a car at night what distance should you turn down your high beam lights?

when you see there tail lights. White lights travel farther then red lights.


What do you do at a cross walk with plinking red?

You stop ! The blinking red indicates the lights are about to change to green for the traffic.


What color are the break lights on a car?

I have never seen any other color than Red brake lights,anywhere in the world.


Where can you get red and blue lights for a the grill of a car?

any lights on the front of a passenger vehicle ie not an emergency vehicle can only be amber of clear