20:54 hours Rescue 34 along with Station 99, Rescue 98 and EMS units, were dispatched to a reported MVA with entrapment at MM 1850 WB Route 422 between Egypt Road and Route 29. MCEDS reported from callers approximately 5 vehicles involved with one vehicle on it roof. Chief 99 arrived on scene and had all units stage at their access points. Fire Police from 99; 34; 98 shut down WB 422 at the Egypt Road off and on Ramps at Egypt Road. FP98-2 assisted at the scene. At 21:30 hours Chief 99 recalled all units with the exception of 99 units and Fire Police. The roadway remained closed until 22:15 hours until the accident scene was cleared. While R34 and SD34 were standing by at their access point, MCEDS advised Chief 34 of a 2nd call in the Borough for a CO detector activation with no symptom. 34 Units responded and Chief 34 advised no additional units required.