A driver must not stop in an intersection or on a road within 20 m of the nearest point of an intersecting road at an intersection with traffic lights.
A driver must not stop in an intersection or on a road within 10 m from the nearest point of an intersecting road at an intersection without traffic lights.
traffic lights
The cost of a traffic light varies and depends on the intersection it is placed. Traffic lights can cost anywhere from $80,000 to $100,000.
If traffic lights are present but are not working (power failure) drivers are SUPPOSED to treat each intersection as if there is an all-directions stop sign. They rarely do that.
If the traffic lights are not working, the intersection is treated like a 4-way stop. That is, as if everyone has a stop sign.
For emergency vehicles to change the traffic lights by remote.
You can infer what traffic lights other people have based on the behavior of their vehicles. For example, if you see a line of cars slowing down and coming to a stop while approaching an intersection, it is likely that the traffic light for that direction is red. Conversely, if you see cars accelerating as they approach an intersection, it is likely that the traffic light for that direction is green.
To keep traffic flowing smoothly and safely. If it were a free for all at every intersection there would be an astronomical number of accidents every day!
Uncontrolled intersection
Lights are situated as red, yellow, green. In complicated traffic patterns, lights can be arrows, or the /do not/ indicators. When a traffic light is non-functioning at an intersection, the first to the right has right of way, and each driver from each of the 4 sides takes a turn in that order.
It is probably a reference to a system which (if it is installed) "reads" signals from authorized emergency vehcles (law enforcement, EMS or FD) and automatically changes the intersection traffic lights to favor the direction in which the emergency vehicle is travelling.
* The disadvantages of traffic lights r * Traffic lights can cause a chaos on the roads.* Also cause a huge traffic
Because, as roads got busier with automobiles, the number of accidents at intersections increased and the number of policemen required to direct traffic at each junction became economically unviable. An automated system - first gas-powered and consisting of an arm with "stop" on it dropping down later changed to electric and later still to multi-color lights - saved money in wages, cut the number of accidents and allowed for the steady increase in cars.