| Answer | Crossword Clue |
|---|---|
| BOTTLENECK | Jam cause |
| RUBBERNECKING | Traffic-jam cause |
| RUBBERNECKING | Traffic jam cause |
| TOLL | Jam cause, maybe |
| BOTTLENECK | Traffic-jam cause |
| gridlock | to cause a severe traffic jam |
| gridlocking | GRIDLOCK, to cause a severe traffic jam |
| gridlocked | GRIDLOCK, to cause a severe traffic jam |
| jammer | cause to become wedged so as to be unworkable jam the typewriter keys |
