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PITTSBURGH (KDKA) — The winter storm is creating some tough driving conditions for the morning rush hour.

Officials have reopened McKnight Road between Brookview Lane and Stevens Drive after a lengthy closure Wednesday morning because of the heavy snowfall.

The Parkway North/I-279 HOV lanes were also closed.

Photos posted to Twitter from show long back-ups on the snow-covered roadway, and police trying to move cars around in order to get a plow truck through.

Heavy traffic started building early this morning on the Parkway West following a crash that blocked all the outbound lanes at Carnegie approaching Rosslyn Farms.

(Photo Credit: KDKA)

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Snow is coating the highway and causing delays on the inbound side as well.

Traffic build-ups were also reported on Interstate 79 southbound at Exit 57 because of a crash in the snowy conditions.

Over on the West End Bridge, a crash was reported on the snow-covered span near Route 51.

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The Port Authority says “all on-street bus routes are delayed about an hour” because of the snow conditions and heavy traffic. Also, bus routes Y46 and Y49 outbound are blocked at 51 at Brownsville Road because of a jackknifed tractor trailer.

Officials with PennDOT imposed a 45 mile per hour speed limit on Interstate 80, the Pennsylvania Turnpike and other highways. Those restrictions went into place at 6 a.m.

Semis hauling empty trailers will not be allowed on those roads until the storm passes.

They’ve also reduced the speed limit on all the Parkways, I-79, Route 28 and Routes 22/30.

They are urging people to avoid unnecessary travel, but telling people who do need to go out to use extra caution.

Stay with KDKA for the latest on the winter weather conditions.

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