LED traffic signal modules as an incandescent lamp alternative

Institute of Transportation Engineers. ITE Journal, Apr 2003 by Iwasaki, Randell H

Caltrans continues to test new LED modules for inclusion on the LED approved products list. At this time, the department has 120 approved LED modules from 10 manufacturers on the product list. As stated previously, Caltrans' retrofit is nearly done, but it still will need modules for new traffic signal and ramp meter installations.

Caltrans uses LED modules to replace all incandescent indications but the department also understands that new technologies are on the horizon. Those technologies will be evaluated continually and applied where appropriate. More information on Caltrans' LED program can be obtained by visiting the LED Web site, www.dot.ca.gov/hq/esc/ ttsb/electrical/electrical/electrical_index.htm.

RANDELL H. IWASAKI, C.E. has been with the California Department of Transportation, better known as Caltrans, for more than 20 years. He currently is the deputy

director of maintenance and operations, overseeing the Traffic Operations, Equipment, Maintenance and Research and Innovation Divisions, a budget of more than $2 billion and almost 9,000 staff He graduated from Cal Poly San Luis Obispo with a B.S. in civil engineering and Fresno State University with a MS. in environmental engineering.