The rule preventing a driver change before the race start was also under scrutiny.

This prevented any possible witness contact with the police before the ambush.

These forces were intended to prevent a build-up before the bridge.

Some 65 percent of the city's 22,000 inmates are held in jail only to prevent their flight before trial.

With a steep seat angle of 80 degrees, its design was said to help prevent leg fatigue before the run.

Federal law prevents proceedings before the board from being used in court cases.

It tends to prevent hostile takeovers before a country's first turn.

So the goal was to try to prevent the act before the attempt.

Maggots have a short shelf life which prevents long term storage before use.

Yet those imperfections did not prevent a good sight of the clearing immediately before the house.