The traffic is always very heavy in some large cities,espcia

The traffic is always very heavy in some large cities,espcially at rush hour.Americans call it a "traffic jam" This word is commonly used when talking about traffic that does not move.Many cities have this problem .In order to solve the problem ,car pools have come into use .This means people will share their car with workmates so they all ride together instead of in separate cars.To encourage car-pooling,in some cities ,you can see some diamond signs on specific lanes,which mean "high occupancy vehicle(HOV) lanes"They are father lanes cities have also tired to solve the problem by setting up traffic dividers and overpasses.They also have very strict traffic regulations.
问题（判断正误）
1 Many large cities are facing traffic problems.
2 Rush hour is the time of day when people are going to or coming from work.
3 Car pools are lines of cars.
4 If someone is caught in a traffic jam in his way to work ,he will probably be late.
5 Only one-passenger cars can drive in lanes with diamond signs.