The observance, which begins today, aims to promote bicycling as a mode of transportation and increase awareness of bicycle safety.

The highlight: Bike-to-Work Day on Friday, May 18. Organizers are organizing a downtown rally at the makai-'ewa corner of Bishop and King streets at 7 a.m., where bike-riding commuters will be greeted by Mayor Mufi Hannemann.

Refreshments will be provided by Starbucks and prizes will be awarded to participants. Prizes have been donated by The Bikefactory, The Bike Shop, Eki Cyclery, Island Triathlon & Bike and the City and County of Honolulu. Free bicycle safety educational materials will be available.

This year's theme for Bike to Work Day is, "You Can!" which touts the benefits of bicycling to include a more active lifestyle, avoiding traffic and saving on gas, improving the environment, and stimulating bike riding and safety.

Hannemann said, "Bicycling is an efficient mode of transportation that helps reduce traffic congestion and environmental pollution. More bicycles and fewer cars will improve the quality of living in Hawai'i; each bike means one less car. It's also a healthy form of exercise." He urged motorists to be courteous to bicyclists and "Share the Road."

The Hawaii Bicycling League is forming commuter convoys to assist riders with safe riding and equipment tips and route selection.