ESTADOS UNIDOS:
ASSHTO: http://www.aashto.org/
ITS: http://www.itsa.org/home.nsf
ITS On Line: http://itsonline.com/
ITS Acess: http://www.itsa.org/home.nsf
International Road Federation: http://www.irfnet.org/
BIRD: http://www.worldbank.org/
OEA (Organization of American States): http://www.oas.org/
IPC (Instituto Pan-Americano de Carreteras): http://www.pih-ipc.orgMÉXICO:
Instituto Mexicano del Transporte: http://www.imt.mx
FRANÇA:
OECD-Org. Economic Cooperation and Development: http://www.oecd.org/
PIARC MAGAZINE ROUTES-ROADS: http://www.piarc.lcpc.fr/rr-e.htm
PIARC - Publications: http://www.piarc.lcpc.fr/pub-somf.htm
Asociación Técnica de Carreteras: http://www.atc-piarc.com/index2.html
ALEMANHA:
Agência de Cooperação Técnica da Alemanha - GTZ: http://www.mindspring.com/~irfgtz/
Agência de Cooperação Técnica da Alemanha - GTZ: http://www.zietlow.com