Planetizen - Urban Planning News, Jobs, and Education

SigAlert: The Story Of L.A.'s Famous Traffic Alert System

What does the 'Sig' stand for in Southern California's 'SigAlert' traffic warning system?
June 5, 2004, 1pm PDT | Abhijeet Chavan | @legalaidtech
Share Tweet LinkedIn Email Comments

"Loyd C. Sigmon, whose 'SigAlert' freeway traffic jam warning system made him perhaps the most famously unknown figure in Southern California, has died...he SigAlert tops everybody's list as one of the most distinctive aspects of L.A.'s car culture...Today, a SigAlert is issued only when one or more lanes of traffic will be blocked for at least half an hour. The term has become so familiar...that it was added to the Oxford English Dictionary a few years ago.

Thanks to Abhijeet Chavan

Full Story:
Published on Friday, June 4, 2004 in The Los Angeles Times
Share Tweet LinkedIn Email