Unless your state has adopted some other modified standard or policy, you need to use the warrants as listed in the Manual on Uniform Traffic Control Devices (USDOT/FHWA, 1988). This is available from the Superintendent of Documents, U.S. Government Printing Office. Other outlets and...
For some low-price, high-value classes (especially in Traffic Engineering), check out Transpeed's courses at <A HREF="http://www.engr.washington.edu/~uw-epp/" TARGET="_new">http://www.engr.washington.edu/~uw-epp/</A>. Transpeed stands for "Transportation Partnership in Engineering...
