(November 2011) Motorcycle Conspicuity and The Effect of Auxiliary Forward Lighting, DOT HS 811 507
(October 2011) Effect of Daytime Running Lights On Left Turning Drivers’ Gap Acceptance, DOT HS 811 506
(September 2011) The Effects of Motor Vehicle Fleet Daytime Running Lights (DRL) on Motorcycle Conspicuity, DOT HS 811 504
(September 2011) Motorcycle Conspicuity and the Effect of Fleet DRL: Analysis of Two-Vehicle Fatal Crashes in Canada and the United States 2001-2007, DOT HS 811 505,
Morgan C. (2001) The Effectiveness of Retroreflective Tape on Heavy Trailers. DOT HS 809 222.