1. Aashto, 2011. Policy on geometric design of highways and streets. American Association of State Highway and Transportation Officials, Washington, DC 1 (990), 158.
2. An automated sign retroreflectivity condition evaluation methodology using mobile lidar and computer vision;Ai;Transp. Res. Part C Emerg. Technol.,2016
3. Highway Geometric Design Guide;Alberta Infrastructure,1999
4. Alberta traffic collision statistics 2014;Alberta Transportation,2014
5. Human Factors Guidelines for Road Systems Transportation Research Board;Campbell,2012