Hidden trooper's setup

• Leadfoot's downfall
• Ticket locale
• Where a cop might take aim at you
• Ticket window?
• Where you might see a cop aim a gun
• Highway hazard
• Cop's hangout
• Device used by police ending in convictions - not entirely shallow then, on reflection?
• Where zippers may get caught

Wikipedia Word definitions in Wikipedia
Speedtrap is 1977 police chase action film starring Joe Don Baker and Tyne Daly .