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Traffic Systems Services Unit

External links
Signal References

AASHTO - American Association of State Highway and Transportation Officials
Center for Education and Research in Safety
Federal Highway Administration
IMSA - International Municipal Signal Association
Manual on Uniform Traffic Control Devices
NEMA - National Electrical Manufacturers Association
http://www.signaltiming.com/ 
Traffic Signal Association
Wapiti Micro Systems 
Northwest Signal Supply, Inc
 
 
ITS References

ITE - Institute of Transportation Engineers
ITS America
ITS Online
NTCIP - National Transportation Communications for ITS Protocol
US Department of Transportation ITS Site
 
 
Training and Certification
 
IMSA Certification and Training
 
Page updated: June 23, 2008

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