Bicycle Helmet Safety Institute
Information on bicycle helmets, standards, and cycling laws; the helmet advocacy program of the Washington (DC) Area Bicyclist Association.
http://www.bhsi.org/

Bicycle Law.com
Legal advice for injured cyclists hurt in traffic accidents or by defective cycling products. Founder Bob Mionske is a cyclist and attorney, and a two time Olympian and former US National Champion.
http://www.bicyclelaw.com/

BicycleSafe.com
An illustrated guide to bicycle safety, including an illustrated guide to how to not get hit by cars.
http://bicyclesafe.com/

Bicycling articles by John Allen (& guests)
Articles on bicycle safety from an expert.
http://www.bikexprt.com/bicycle/index.htm

Bicycling Street Smarts
A compact tutorial on how to ride a bicycle in mixed traffic.
http://www.bikexprt.com/streetsmarts/index.htm

Bicycling: Commuting, Touring, Camping, and Safety
Commuting and safety tips.
http://www.khurramweb.com

eMedicine Health - Bicycle Safety
Consumer health resource center providing bicycle safety information.
http://www.emedicinehealth.com/bicycle_safety/article_em.htm

First Aid for Injured Mountain Bikers
Descriptions and photos of typical mountain bike injuries, with immediate care, assessment, and treatment.
http://www.utahmountainbiking.com/firstaid/

MassBike Bike Laws and Legislation
Links to the bicycle laws for US states and beyond.
http://www.massbike.org/bikelaw/

Melbourne Magpies - Watch Out Cyclists!
Provides details of local locations for cyclists to avoid.
http://www.step-hen.com/magpie.htm

National Bicycle Safety Network
An American coalition of public and private organizations and agencies working together to increase safe bicycle use. Great resource for safety issues, especially traumatic head injury reduction.
http://www.cdc.gov/ncipc/bike/default.htm

Palmetto Cycling Coalition
A non-profit organization dedicated to making South Carolina safe for all cyclists.
http://www.pccsc.net/

ProBicycle
On-road bicycling advocacy.
http://probicycle.com/

Safe Cycling Lessons
Safe cycling tips from the Lawrence Livermore Lab in California (note - applies to U.S. road law).
http://www.llnl.gov/es_and_h/lessons/cycling_e.html

Seidler Productions
Traffic education for kids, public service announcements, links and bicycle safety products.
http://www.seidlerproductions.com