Safe distance is 2 seconds, or 4 car lengths. More if snow is on the ground or its raining.
A waterway is for ships, a highway is for cars.....That simple....
It depends usually a hybrid car such as a Toyota Prius gets up to 45 mpg highway compared to an average of 20-25 for normal cars
47 highway/ 36 city.
cars/time
ten feet
20 km
The force of gravity will also depend on the distance between the cars. Choose a suitable distance, then replace the numbers in the formula for gravitational attraction.
Six car lengths is a good distance.
The exact figure is a decimal. Between two and three cars is the American average.
you should give at least a foot of space...
100 fy
Smart cars are fairly good on gas mileage. The average smart car can get up to 32 miles per gallon on the highway.