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

Answer:

t = 7.5 s

Explanation:

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

$v = 24 mph$

here we know that

$v = 24 \times \frac{1602 m}{3600 s}$

$v = 10.68 m/s$

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

$t = \frac{L}{v}$

$t = \frac{80}{10.68}$

$t = 7.5 s$