Chapter 4N. Warning Beacons for Emergency Vehicles¶
§4N.01 Application of Emergency Vehicle Warning Beacons¶
Option
01. An emergency vehicle warning beacon may be installed if there is a minimum of 30 calls per month (360 per year) requiring an emergency vehicle response and at least one of the following:
- A. Poor sight distance which cannot be corrected economically, or
- B. A crash problem, or
- C. High approach speed.
Guidance
02. The sight distance determination should be based on the location of the visibility obstruction for the critical approach lane for each street or drive and the posted or statutory speed limit or 85th-percentile speed on the major street, whichever is higher.
Standard
03. If used, an emergency vehicle warning beacon shall be installed on top of the WATCH FOR EMERGENCY VEHICLES (W11-12T) sign and the WHEN FLASHING (W16-13P) plaque shall be installed below the W11-12T sign (see Section 2C.54). Flashing beacon units and their mountings shall follow the provisions of Chapter 4D and 4L.
Figure 4N-1. Sequence for an Emergency-Vehicle Hybrid Beacon DELETED