To obstruct or stop up, as a road; to stop the passage of a highway; to intercept on the road, as goods on the way to market.
To anticipate, to act foreseeingly.
To preclude or bar from happening, render impossible.
To prevent, delay or hinder something by taking precautionary or anticipatory measures; to avert.
To deprive (with of).
Something situated or placed in front.
To command or force someone to drive their vehicle to the side of the road or curb and come to a stop.
To come to a stop, and turn off the road (i.e. onto the roadside or hard shoulder).