A roughly year-and-a-half repaving project on Route 30 in York County is slated to get under way Monday.

Crews will begin preparing the nearly 4.5 mile stretch — from North Hills Road in Springettsbury Township to the bridge over Kreutz Creek Road in Hellam Township — for the project, according to the state Department of Transportation.

The start of the project could be delayed if there's inclement weather.

Though the later portion of the work will be done at night, Mike Crochunis, a PennDOT spokesman, said motorists might encounter delays during its earlier stages as crews complete the preparation work.

"It shouldn't be too much of an inconvenience at the onset," he said.

Kinsley Construction Inc. will complete the $3.4 million project.

Getting ready: The preparation work includes surveying and guide rail installation, causing crews to restrict the highway to a single lane, shift traffic patterns and close shoulders at times during the day on weekdays, PennDOT said.

But come early May, crews will switch to working at night between 8 p.m. and 6 a.m. to mill and resurface the highway.

Working at night will alleviate traffic problems for the majority of the more than 45,000 motorists who use the highway daily, Crochunis said.

Crews also will repair the concrete base of the highway, PennDOT said.

Sinkhole repair: At some point during the project, crews will repair a sinkhole near the Shoe House Road overpass, Crochunis said.

The sinkhole developed last year and had been temporarily repaired.

"We'd been out there a bunch of times with the county's (PennDOT) maintenance crew," Crochunis said.

The repair work to be done during the project should be a permanent fix. That work will be done on a weekend, and the highway will be reduced to a single lane, he said.

PennDOT will alert motorists closer to the date when sinkhole repair work will be done.

The overall project is expected to be finished in September 2015.

— Reach Greg Gross at ggross@yorkdispatch.com.