The following list includes links to webpages and free documents that are available online.
FHWA
Manual on Uniform Traffic Control Devices (MUTCD), Current Edition with Revisions
Separated Bike Lane Planning and Design Guide
Pedestrian and Bicycle Safety Resources
Model Systems Engineering Documents for Adaptive Signal Control Technology Systems
ADA-Accessibility Resource Library
NCHRP
NCHRP Synthesis 403, Adaptive Traffic Control Systems: Domestic and Foreign State of Practice
NCHRP Report 562, Improving Pedestrian Safety at Unsignalized Crossings
NCHRP Report 672, Roundabouts: An Informational Guide
CDOT
NMDOT
NACTO