https://www.accidentreconstruction.com

This site  has an expert listing as well as general information regarding traffic collision investigations.

Related Links 

http://www.actar.org/actarmembersearch.asp

ACTAR stands for Accident Commission for Traffic Accident Reconstructionists.  This commission tests basic knowledge of the principles of collision reconstruction.  The successful candidate receives their accreditation and must maintain their continued education in the field to be accredited.

http://www.nhtsa.gov/

The National Highway Traffic Safety Administration has general information regarding the automotive industry

http://www.collisionsafety.net/

The Collision Safety Institute (CSI) is an independent traffic collision research, training and crash consulting organization. For nearly 14 years now, CSI’s mission has been to provide state-of-the-art training and technology transfer to both public and private entities involved in the analysis and evaluation of motor vehicle collisions, provide technical support to professional associations and organizations in their training efforts and conduct testing and research on surface vehicle collision topics and related technology.