MATERIALS ENGINEERING AND TESTING SERVICES
Materials Engineering and Testing Services
Office of Roadway Materials Testing
Electrical Testing Branch
state furnished traffic signal control equipment
The State Furnished Transportation Electrical Equipment Program is designed to keep the Caltrans warehouse stocked with the below mentioned products that can then be used on State highway projects, Permit projects, etc. It is the responsibility of the TransLab to ensure that all of those products are in complete compliance with Caltans specifications, currently Transportation Electrical Equipment Specifications (TEES), March 2009.
Because of the high volume of electrical devices, it is impossible to perform 100% testing. Therefore, the TransLab has developed a testing strategy that complies with ANSI/ASQC Z1.4-2008, Sampling Procedures and Tables for Inspection by Attributes. Derived directly from MIL-STD-105E, this allows the TransLab to "sample test" from a larger lot size of devices. Acceptance or rejection of an entire lot is dependent upon statistical acceptable quality levels (AQL). These AQLs define the maximum number of failures that can be tolerated while still considering the lot to be considered compliant.
Under this program, traffic signal control devices are accepted only from manufacturers and vendors that have been placed on the Caltrans Qualified Products List (QPL).
Here are some of the State Furnished Traffic Signal Control Equipment:
170E Controller 2070E Controller 332L/334L/336L Cabinets 208/210 (Watch Dog Monitor/Conflict Monitor) 400 (Modem) 200/204 (Switch Pack/Flasher 222/224 (Loop Detectors) 232/234 (Magnetic Detectors) 242/252 (DC and AC Isolator) CMS (Changeable Message Sign) BBS (Battery Backup System)
James.Rhodes@dot.ca.gov , Transportation Engineer (Electrical)
Fax (916) 227-7026
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