Dump the Pump Day is June 15. This is a national holiday that celebrates trying public transit and leaving your car parked. The S will provide free rides on fixed routes, commuter buses, and all demand response services (ADA Paratransit, Dial-A-Ride, and Medivan). Turlock Transit will provide free rides on fixed routes and ADA Paratransit. Plan your travel at on The S and Turlock Transit. Free rides are made possible through a grant from the California Department of Transportation (Caltrans) under the Low Carbon Transit Operations Program (LCTOP).