Best Practice

BEST PRACTICE:

G4-23: Sequential Warning Lights for Lane Closures

DESCRIPTION:

Sequential Warning Lights are wireless Light Emitting Diode (LED) lights that flash in a sequence to delineate transition tapers, specifically during nighttime hours. They are designed to improve driver recognition of lane closures by providing clear directional guidance and to enhance the visibility of work zone entrances/exits.

REASON(S) FOR ADOPTING:

These wireless devices are useful for facilitating early merging at night work zones. By encouraging early merging, the work zone has a lower risk of being struck by a vehicle, making the work zone safer for both workers and drivers.

PRIMARY BENEFIT(S):

The benefits of Sequential Warning Lights include an increase in early merging and greater visibility of work zones at night.

MOST APPLICABLE LOCATION(S)/PROJECT(S):

Work zones that are active at night and that involve a lane closure, lane shift, or other traffic pattern change are the most applicable locations for Sequential Warning Lights.

STATE(S) WHERE USED:

California , Indiana, Iowa, Kentucky, Massachusetts, Missouri, New York, Ohio

SOURCE/CONTACT(S):

Samir Ead, Construction Safety Coordinator, Caltrans
Phone: (916) 654-4580
E−mail: Samir.ead@dot.ca.gov