I want to get a beam style infrared motion sensor for our bridge so I know when people are coming before they reach the driveway

So. Are any of you familiar with this? I know there are grid based moton sensors that detect any movement over a wide area, but I just want a beam that alarms when it is broken.

Roughly the beam needs to reach across a 14 foot gap, And the sensor itself needs to either be capable of sending the signal wirelessly 260 feet, Or have one hell of cord to it.

Assist?