1. Brabb DC, Vithani A, Martin K. 2017. In-depth data analysis of grade crossing accidents resulting in injuries and fatalities. U.S. Department of Transportation, DOT/FRA/ORD-17/04 [accessed 2021 Feb 10]. https://railroads.dot.gov/elibrary/depth-data-analysis-grade-crossing-accidents-resulting-injuries-and-fatalities.
2. Federal Highway Administration. 2019. Traffic volume trends [accessed 2021 Jan 12]. https://www.fhwa.dot.gov/policyinformation/travel_monitoring/tvt.cfm.
3. Federal Railroad Administration. 2018. U.S. crossing accident data. [accessed 2020 Nov 11]. https://safetydata.fra.dot.gov/officeofsafety/publicsite/Query/ConsolidatedHwyRailIncidents.aspx.
4. Safety Assessment of the Level Crossing in Cold, Snowy Regions
5. Motor vehicle driver injury severity study under various traffic control at highway-rail grade crossings in the United States