Question

To be parked legally, a vehicle must be within:

1) 18 inches of the curb.
2) 24 inches of the curb.
3) 12 inches of the curb.
4) 6 inches of the curb.

Answer 1

A car must be at least 47.62 meters or about 13.6 car lengths away to safely cross the road, given that the car is traveling at 60 km/hr and you need to cross 4 meters at an average walking speed of 1.4 meters/second.

Step-by-step explanation:

When answering how far away a car must be to cross the road safely, you will need to calculate the time it takes for a pedestrian to cross an additional 2 meters further than the width of the car, given the speed of the car.The car travels at 60 km/hr, which is equivalent to 16.67 meters per second (60,000 meters divided by 3600 seconds). Since you need to cross 4 meters (the width of the car plus an additional 2 meters), we will calculate the time it takes for the pedestrian to cross this distance.

Now, let's consider a pedestrian walking speed. The average walking speed of a human is about 1.4 meters per second. If you need to travel 4 meters, it will take approximately 2.86 seconds (4 meters divided by 1.4 meters/second) to do so safely. Therefore, you should see the car at least 47.62 meters away (16.67 meters/second multiplied by 2.86 seconds) to cross the road safely before it reaches you. This is roughly equivalent to 13.6 car lengths away (47.62 meters divided by the average car length of 3.5 meters).