1960 Pittsburgh map, September 2, 1960
homi the report poll were a 16 -which were a to Local firm TRAFFIC ROUTE NETWORK GREATER PITTSBURGH AREA Traffic Route Network Being The accompanying map shows traffic route network in the Pittsburgh Pittsburgh area that mil be established established later this year and early next year as signs designating t h e changes are erected. The canges pere announced in .Pittsburgh on July 15. Main changes involve elimination elimination of Route 88 northwest of the city (it will become Route 65), ilimination of Route 28 southwest if the city (it will become Route 50.), establishment of new state routes 20.., 121, 201, 207 and 280, and replacement of Route 80 in the city, by the route number. 380. The new numbering is built on the premise that the Penn-Lincoln Penn-Lincoln Parkway (Interstate 70) has changed driving habits and that the older state numbered routes now serve chiefly as feeder routes to the express highway. Note that route W will terminate terminate at Sharpsburg and Route 88 will end at its intersection with Route 51 near Brentwood. Only one state numbered route i'51) will' continue through t city. Previously, three s t a routes did so. A key aim of the route numbering numbering revision is to simplify signing on the highways. Several different route numbers on a single sign standard.especially along a high speed express highway, fend to confuse motorists.