PennDOT is asking motorists to be alert for surveyors working along Interstate 81 in Cumberland County.
The surveyors are working between Exit 57 for Mechanicsburg and Exit 59 for Camp Hill to prepare for a major project set to begin in 2016 that will extend I-81 to three northbound lanes and three southbound lanes in that area.
PennDOT says the surveyors will be on site between 6 a.m. and 4 p.m. on weekdays for the duration of this week and over the next two weeks. They are not expected to restrict traffic but may need to cross the highway and work in the median.
The project will cost an estimated $29 million, funded by the state's new transportation plan.
PennDOT District 8 executive Mike Keiser said they are also planning to widen I-81 in Dauphin County from the I-83 split to Exit 72 for Paxtonia.