- (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.