1.   The sheriff had suggested that more detonators, designed to alert drivers if they passed red light, be installed.

2.   And drivers will be alerted by electronic message boards, radio broadcasts and, someday perhaps, wireless Internet bulletins sent to onboard computers.

3.   And electronic message boards alert drivers to adverse conditions at the start of the bridge and before their ascent.

4.   Another device in the works could alert drivers if they weave between lanes.

5.   As they pass the tolls, money is automatically deducted from their accounts and a flashing red display light alerts the driver when his account begins to run low.

6.   A new option this year is a reverse sensing system that alerts drivers to objects at the rear when backing up.

7.   A new warning system will alert drivers when schoolbuses ahead of them are about to stop, even if those buses are hidden beyond a blind curve.

8.   A rear-bumper-mounted sensor system alerts the driver to rear obstacles.

9.   A warning light alerts the driver.

10.   For example, the Cadillac Fleetwood has a chime that alerts a driver who has left the turn signal on.