Clarkstown police said the injuries appeared to be minor.
The emergency medical technician had responded to the scene of a motorcycle accident.
Part of North Highland Avenue is closed and some nearby residents are without power as O&R works on repairs.
Thruway Authority officials urged motorists to avoid the area.
The crash happened at a crossing in Ramapo.
Police said he hit the rear of a parked tractor-trailer.
Traffic delays this morning were massive when an NJ Transit train became disabled at the crossing with Main Street in Spring Valley.
About 1,000 customers lost power early Thursday morning. The road was closed from before dawn to after dusk.
Drivers and TOR bus riders will be affected.
The New York State Thruway Authority will hold a public information session in March.
Expect delays, police said.
Lane shifts, closures on the southbound Thruway could also affect motorists entering from Route 17 or I-287.
Commuters are upset about unreliability, conditions, overcrowding and high cost, and officials have had it with the public transit agencies.
The work will start Monday.
Closures, each side, mostly at night
Buses to substitute for weekday off-peak trains and trains on select weekends.