Category talk:616 Temporary Traffic Control
The work zone figure entitled "a typical detour" shows signs numbered 17R, 18, 29 and 52 on sheet 1, but does not define what these signs are. --Martik2 15:57, 28 January 2009 (CST)
Keith L. Smith: Sorry for the delay in answering you. These signs are identified in Fig. 616, Signs and Devices Legend. "17R" is Detour (right), M04-1; "18" is Detour Ahead, WO20-2; "29" is Road Closed, R11-2 and "52" is End Detour, MO4-8a. Someday we will have the technology to improve on this method that relies on using a legend to decode the signs' numbers.