About 350 property owners have been sent "notice to enter" letters by the Pennsylvania Turnpike Commission, part of evaluating potential alignments for a 12-mile section of the Southern Beltway between Route 22 and Interstate 79 along the Allegheny-Washington county line.
About 500 notices have been sent in previous mailings dating back to August 1998.
The letters do not mean property will be acquired for eventual construction of the proposed segment of toll road, or even that surveyors or engineers will necessarily enter anyone's property.
But the letters do notify owners of that possibility as consultants assess routes not only for construction feasibility but also for issues such as disruption of businesses, historic features, wetlands, parks and other features.
The section involves properties in Robinson, Cecil and Mount Pleasant Township and, for the first time, McDonald in Washington County, and North Fayette and South Fayette in Allegheny County.
The Southern Beltway consists of two other sections also in various phases of study and design.
The total beltway is to be about 28 miles, from Route 60 across from Pittsburgh International Airport east to the Mon-Fayette Expressway near Finleyville.