Just prior to rush hour, units from United Fire Company's Spring Ridge Station 33, along with Frederick County ALS were dispatched to the area of Reich's Ford Road at Bush Creek for a vehicle collision with reported entrapment. Enroute, Frederick County's Emergency Communications Center advised responding units of the possibility of multiple entrapments in two vehicles. Utility 27 from the Frederick County Training Center was the first unit to arrive on the scene reporting a two vehicle collision with multiple patients entrapped in one vehicle and a single patient trapped in the second vehicle, also two subjects out of the vehicle. Additionally, utility 27 advised that radio communications were to be hindered due to the location and topography of the area, portable radio use was at a minimum. Engine 331, Ambulance 339 and Safety 901 were the next units to arrive on the scene. Lieutenant Bennett from Engine 331 established Reich's Ford Road Command. FD-201 arrived on the scene and began to assess the need for aviation. Rescue Squad 3, Medic 2, Chief 3-1 and Medic 23 arrived on the scene. Chief 3-1 assumed command after a face-to-face with Lieutenant Bennett. The Rescue Squad initiated vehicle stabilization on both vehicles. Chief 3 arrived on the scene assuming Rescue Sector operations while FD-201 assumed EMS sector operations. Command requesting aviation, per EMS sector, for a category "A", priority 2 patient still entrapped. EMS sector reported to command that five patients required transport. Crews began utilizing hydraulic rescue tools to gain entry to the passenger compartments of both vehicles. E.C.C. advising Trooper 3 was enroute in approximately 5 to 7 minutes. Command requesting an additional engine company from the Urbana side of the incident to handle the landing zone. Initial landing zone was to be in the area of Mussetter Road and Ijamsville Road, pending arrival of the landing zone engine. EMS sector requesting additional aviation for a second category "A" priority 2 patient also still entrapped. Command requesting all incoming Basic Life Support transport units to reposition and enter the scene from the Urbana side of the incident. Rescue sector advising one patient extricated. Command requesting Air/Light unit or county light pod for use by the Frederick County Sheriff's Office. First patient transported by Ambulance 238 and medic 23 to Suburban Hospital. Rescue sector advising second patient extricated. Urbana Fire Company's Engine 231 responded to the landing zone to receive Trooper 3 and Medstar 4. One patient transported by Ambulance 259 to the landing zone for delivery to Trooper 3. Ambulance 38 began transport to Washington County's Adult Trauma Center, requesting rendezvous with an Advanced Life Support Unit from the city. Medic 31 was dispatched to rendezvous with ambulance 38. EMS sector requesting an additional transport unit to the scene since ambulance 339 was utilized for triage and treatment. Ambulance 239 transported a second patient to the landing zone for Medstar 4. Rescue sector reporting the third and final patient extricated. Air/Light unit 4 arrived on the scene from the Urbana side of the incident as requested. Ambulance 149 arrived on the scene to transport the final patient to Washington County's Adult Trauma Center with EMS-901 as the ALS provider. Command requesting a County Highway sand truck for fluid on the roadway. Command was terminated with units clearing as they were ready; the scene was turned over to the Frederick County Sheriff's Office.