(Tulsa, Ok)--Rising gasoline prices are credited for a spike in motorcycle ridership. The number of scooters and cycles on Tulsa streets multiply daily. To promote their love of riding and also safety, the group Two Wheel Oklahoma held Ride To Work day on Wednesday. Rider Rex Brown says fellow riders and those driving cars and trucks must be extra cautious as they share lanes on roads and highways. It is estimated the number of cycle riders increases by 30 percent each year.