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| Guideline | Flashing Beacons/Warning Lights Design Guideline 1 |
| Title | Supplement to Lane-use Signals |
| Text | Flashing beacons should not be installed together with lane-use signals, as it provides contradictory information to drivers. |
| Commentary | Use with lane-use signals presents contradiction to MUTCD. |
| Guideline | Flashing Beacons/Warning Lights Design Guideline 2 |
| Title | Supplemental to Canopy Signs |
| Text | Flashing beacons may be used as warning devices with canopy lane status signs for ETC dedicated lanes only, with the intended purpose of indicating the location of the dedicated ETC lane(s) when approaching the conventional plaza lanes. |
| Commentary | Installation of the flashing beacon at the bottom of the lane status sign has been shown to be effective in highlighting the location of the ETC dedicated lanes when maneuvering within the queue zone to find the toll lane with the shortest vehicle queue. |
| Guideline | Flashing Beacons/Warning Lights Design Guideline 3 |
| Title | Overall use of Flashing Beacons |
| Text | Flashing beacons may be used in overhead mounts to supplement canopy lane status signs for ETC dedicated lanes, or on impact attenuators or toll island crash blocks/ramparts at toll plazas. |
| Commentary | Use should be limited as much as possible to minimize distractions to drivers. Only the yellow color application should be considered. An automatic dimming device may be used to reduce the brilliance during night operation. The flashing beacons mounted on the island should be at an appropriate height above the ground for viewing. |
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