Early on this beautiful Saturday morning CALS and St-Leonard were alerted for a reported accident reported serious on RT-4 at Calvert Cliffs PKWY. CAR10 having juts gone in service and already enroute to Prince Frederick to start duty was the first unit on scene with the Calvert County Sheriffs Office. Bystanders had already removed the sole driver occupant from her car upon EMS arrival. CAR10 relayed the updated information back to responding units and initiated immediate care. PA237 was the transport and care was transitioned to them for transport. Being a busy day already CAR10 had to clear the scene to pick up another "medic local" in the Solomons area.