A safety improvement project at the intersection of Route 18 and Williamson Road at the border of West Salem, Hempfield and Sugar Grove townships in Mercer County is scheduled to start March 24.
The project will include realigning Williamson Road (Route 4006) on the east side to be directly opposite its intersection on the west side. It is currently offset by approximately 10 to 12 feet. It will also include radii improvements at all corners and sight distance improvements on the southeast corner of the intersection as well as drainage upgrades, milling, paving, sign updates, and pavement markings.
Some preliminary work at the intersection was done in fall 2024. Major construction is expected to begin March 24, 2025, weather permitting, and is expected to be completed by October 2025.
The project will require a detour, which will be posted using Route 58 (College Avenue) and Route 358 (Main Street). The detour route is expected to be implemented on April 14 and be in place for 100 calendar days.
At times when the detour is not in place, motorists may encounter lane restrictions with traffic controlled by flaggers.
The contractor is Glenn O. Hawbaker of State College, PA. The contract cost is $932,932, which is to be paid entirely with federal funds.
Information on the Route 18 and Williamson Road Intersection Project is available online at www.penndot.pa.gov/District1 under the Projects Near You and the District 1 link.
This year PennDOT’s Northwest Region expects to work on more than 100 projects. To see a full listing of all the anticipated work, check out the 2025 Construction Book located under the Partner Resources section at www.penndot.pa.gov/District1.
PennDOT urges motorists to slow down when driving in work zones, and also to be alert to changing conditions, avoid distractions and to pay attention to signs and flaggers. Drive responsibly in work zones for your safety and the safety of the workers.
Motorists can check conditions on major roadways by visiting www.511PA.com. 511PA, which is free and available 24 hours a day, provides traffic delay warnings, weather forecasts, traffic speed information and access to more than 1,000 traffic cameras.
511PA is also available through a smartphone application for iPhone and Android devices, by calling 5-1-1, or by following regional Twitter alerts accessible on the 511PA website.
Subscribe to PennDOT news and traffic alerts in Crawford, Erie, Forest, Mercer, Venango, and Warren counties at www.penndot.pa.gov/District1.
Information about infrastructure in District 1, including completed work and significant projects, is available at www.penndot.pa.gov/D1Results. Find PennDOT’s planned and active construction projects at www.projects.penndot.gov.
Find PennDOT news for the northwest region on X or Facebook.
MEDIA CONTACT: Jill Harry, 814-678-5035 or jharry@pa.gov
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