According to ???Accessible Pedestrian Signals: A Guide to Best Practices,??? prepared in 2009 for the National Cooperative Highway Research Program (NCHRP, <a href="http://www.apsguide.org/)">http://www.apsguide.org/)</a> the Americans with Disabilities Act (ADA), among other federal laws, requires state and local government programs and facilities, including sidewalks and crosswalks, to be accessible to people with disabilities.