TULSA, Oklahoma -- You may notice more motorcycles on the road Monday across Tulsa and the rest of the state. Monday is National Ride Your Motorcycle To Work Day. The Oklahoma Highway Safety Office hopes the day will help illustrate the increasing number of motorcyclists on the roads and how important it is for drivers of all types of vehicles to share the roadway. In 2009 in Oklahoma, there were more than 123,000 registered motorcycles, according to the Oklahoma Tax Commission. That's a 7.4 percent increase over the 115,000 registered motorcycles in 2008. The first Ride to Work Day took place in July 1992.