The standee line:

Question

While a bus is traveling, passengers may not stand any farther forward than the rear of the driver's seat. To mark this barrier, a bus that is designed to allow passengers to stand must have a two-inch line on the floor (or some other means of showing passengers where they cannot stand). This is known as the standee line.

Accepted Answer

Is a line on the floor of a bus that passengers may not cross.

Answer

Is a single-file line of standing passengers.

Answer

Shows the maximum number of people allowed on a bus.

Answer

Shows how tall the passengers on a bus may be.