Question

The stoplights on a street are designed to keep traffic moving at 24 mi/h. The average length of a street block between traffic lights is about 80 m. What must be the time delay between green lights on successive blocks to keep the traffic moving continuously? There are 1.609 × 103 m in a mile. Answer in units of s.

Answer 1

t = 7.5 s

Step-by-step explanation:

As we know that the average speed between two lights is given as

`v = 24 mph`

here we know that

`v = 24 * (1602 m)/(3600 s)`

`v = 10.68 m/s`

now the distance between two lights is 80 m

so here if all the cars are moving continuously between two lights then the time delay between two lights is given as

`t = (L)/(v)`

`t = (80)/(10.68)`

`t = 7.5 s`