1.Manual on Uniform Traffic Control Devices (MUTCD). Millenium Edition. Federal Highway Administration (FHWA), Washington, D.C., 2000.

2.Bentzen, B.L. & Tabor, L.S.(1998). Accessible Pedestrian Signals.U.S. Access Board, Washington, D.C.,1998.

3.Building a True Community. Final Report. Public Rights-of-Way Access Advisory Committee (PROWAAC), U.S. Access Board, Washington, D.C.,January 2001.

4.History Web Site. http://www.sonic.net/~lindam/historyday/history.html, Accessed October 1, 2002.

5.Pline, James L. (Ed.). Traffic Control Devices Handbook. Institute of Transportation Engineers, Washington, D.C., 2001.

6.Traffic Control System Operations: Installation, Management, and Maintenance. Institute of Transportation Engineers (ITE), Washington,D.C., 2000.

7.Barlow, J.M., Bentzen, B.L., & Tabor, L.S. Accessible Pedestrian Signals: Synthesis and Guide to Best Practice. Draft Report. National Cooperative Highway Research Program, Project 3-62, January 2003.

8.Bentzen, B., Barlow, J., Franck, L. Determining Recommended Language for Speech Messages used by Accessible Pedestrian Signals: Final Report.Accessible Design for the Blind, Berlin, MA, January, 2002.