1. Yager TJ, Rado Z, Hall JW, Smith KL, Titus-Glover L, Wambold JC (2009) Guide for pavement friction. National Cooperative Highway Research Program. https://doi.org/10.17226/23038
2. Najafi S (2015) Pavement friction management (pfm)-a step towards zero fatalities
3. Flintsch G, McGhee K, Izeppi EDL, Najafi S (2012) The little book of tire pavement friction. Apps.Vtti.Vt.Edu, no. September, pp 0–22
4. Smith KL, Larson RM, Flintsch GW, Sherwood J (2012) Improving highway safety through pavement friction management programs
5. Susan Herbel CM, Laing L (2010) Highway safety improvement program (HSIP) manual [Online]. Available http://safety.fhwa.dot.gov/hsip/resources/fhwasa09029/sec2.cfm.%0A; http://www.dot.state.mn.us/stateaid/trafficsafety/reference/2015-mndot-safety-handbook-large.pdf%5Cn; https://trid.trb.org/view/1364692