Here are additional references on mine haul road design.

Haul Road Design – copies of technical papers, etc.
http://oasisapps.curtin.edu.au/staff/profile/view/R.Thompson

Canadian Haul Road Guidelines (2003). http://www.smartmines.com/mhroad/guidelines.pdf
http://www.scribd.com/doc/25947612/Haul-Road-Design-Guidelines-11672

Kaufmann and Ault (1977) Haul Road Guidelines
http://www.cdc.gov/niosh/mining/userfiles/works/pdfs/ic8758.pdf

Haul Road Inspection Handbook (1999)
http://www.msha.gov/READROOM/HANDBOOK/PH99-I-4.pdf

Blind Areas Report (Haul Trucks)
http://www.usmra.com/repository/category/mobile_equipment/BASFinalReport.pdf

EMESRTgate – Earth Moving Equipment Safety Roundtable – Surface
http://www.mirmgate.com/index.php?pageId=gates/emesrt/dp&nodeId=2

INFOMINE Technology Review – Mine Haul Roads
http://technology.infomine.com/reviews/mineroads/welcome.asp?view=full

AustRoads guides – Guide to Road Safety, Guide to Road Design. Available at
https://www.onlinepublications.austroads.com.au/?override=1

Caterpillar Global Mining Haul Road Design and Management http://www.directminingservices.com/wp-content/uploads/2010/06/CAT-Haul-Road-Design.pdf