What causes traffic jam?

Question

What causes traffic jam?

Answer 1

accidents and people that dont know how to merge properly...  the idea is that people getting on to a freeway merge with traffic, not force traffic to slow down to accomodate them.  some people are just stupid i guess

Answer 2

Jerks that want to go first, instead of letting me go first, as they should.

That's a joke, of course. The law says you may not enter an intersection unless you can clear the intersection. If everybody followed that law, there would be no traffic jams.

Answer 3

Too many people on the road, but also a few bad apples doing fancy maneuvers, spoiling everything for the rest of us.

Answer 4

Rubber necks! not concentrating on the road ahead but on what they may be missing on the other side of the road.

Answer 5

Too many vehicles using the same stretch of road at the same time.

Everyone want to go first cutting and driving dangerously ,that annoys other driver to drive the same way that causes accident that creates even more traffic jams.