Just before lunch units from station's 3 and 31 and 23 were alerted for a crash on I270 south prior to RT85 involving a tractor trailer. First arriving FD201 "Chisholm" arrived and advised single tractor trailer off the road with one occupant out of the vehicle. I270 command was est. holding units on the call from the south bound assignment clearing Co. 23 units, and adding HIRT 31 and MDE for fluid loss from the tractor. Command held the units on scene while for clean up and fuel offload / transfer while the patient was taken to FMH for an evaluation.