page_title: Pennsylvania Route 100
section_title: History
hierarchical_section_title: Pennsylvania Route 100 / History
caption_attribution_description: Old Pennsylvania State Route 100 in Bechtelsville, Pennsylvania.
context_page_description: Pennsylvania Route 100 is a 59.4-mile long state highway in the U.S. state of Pennsylvania that runs from U.S. Route 202 near West Chester north to PA 309 in Pleasant Corners. The route runs between the western suburbs of Philadelphia and the Lehigh Valley region of the state, serving Chester, Montgomery, Berks, and Lehigh counties. PA 100 intersects several important highways including US 30 in Exton, the Pennsylvania Turnpike near Lionville, US 422 near Pottstown, US 222 in Trexlertown, and I-78/US 22 in Fogelsville. PA 100 has several sections which are multi-lane divided highway with some interchanges, including between US 202 and the Pennsylvania Turnpike in Chester County, between south of Pottstown and New Berlinville, and between Trexlertown and Fogelsville.
  What would become PA 100 was originally designated as PA 62 in 1927, running between the Delaware border south of Chadds Ford and US 309/PA 312 in Allentown. PA 62 was rerouted to reach its northern end at PA 29 in Pleasant Corners a year later. A northern section of PA 62 was designated between PA 15 in Wilkes-Barre and US 106/PA 7 in Tunkhannock in 1927, being replaced with PA 92 a year later.
context_section_description: When Pennsylvania first legislated routes in 1911, what would become PA 100 was legislated as Legislative Route 282 between the Delaware border and Lenape, Legislative Route 134 between Lenape and West Chester, Legislative Route 147 between West Chester and Pottstown, Legislative Route 284 between Pottstown and Hereford, and Legislative Route 158 between Hereford and Shimerville. At this time, the road was paved between Boyertown and north of Bally. By 1926, the entire length of the road between Chadds Ford and north of Hereford was paved. PA 62 was designated in 1927 to run from the Delaware border south of Chadds Ford north to US 309/PA 312 in Allentown. The route followed the Brandywine Creek through Chadds Ford to Lenape, where it ran concurrent with PA 52 to West Chester. From here, PA 62 headed north along Pottstown Pike to Pottstown, where it passed through the borough on Hanover Street. The route continued north on Farmington Avenue to Boyertown and ran through Bechtelsville and Barto on its way to Bally. PA 62 ran north along present-day PA 100 to Shimerville, where it continued to Allentown. A northern section of PA 62 was designated between PA 15 in Wilkes-Barre and US 106/PA 7 (now US 6) in Tunkhannock. A year later, PA 62 was realigned at Shimerville to head north through Macungie, Trexlertown, and Fogelsville to its new northern terminus at an intersection with PA 29 (now PA 309) in Pleasant Corners. PA 29 replaced the PA 62 designation between Shimerville and Allentown. By this time, the route was paved from north of Bally to Macungie. The northern section of PA 62 was decommissioned in 1928 and replaced with PA 92 (now PA 309 south of Bowman Creek and PA 29 north of Bowman Creek). By 1930, the route was paved between the Delaware border and Chadds Ford and between Macungie and Fogelsville. At this time, the road was under construction from Fogelsville to north of Claussville.
  PA 62 was renumbered to PA 100 on June 1, 1932 in order to avoid conflicting with US 62, which was designated in the northwestern part of the state. The road was paved between Fogelsville and Pleasant Corners during the 1930s. At the Delaware border, PA 100 connected to DE 100, which was designated in 1938. By 1953, PA 100 was realigned to its current straight alignment between south of Bechtelsville and Bally, bypassing Bechtelsville and Barto to the east. The former alignment is now known as Main Street and Old Route 100.
  In 1954, the current alignment between Hanover Street in North Coventry Township and Farmington Avenue in Upper Pottsgrove Township was built, with interchanges at PA 83 (now PA 724) and US 422 (High Street). At this time, PA 100 still continued through Pottstown on Hanover Street and Farmington Avenue. In the 1950s, a realigned US 309 replaced the PA 100 designation between US 22 in Fogelsville and Pleasant Corners. By 1959, PA 100 was widened into a divided highway between Boot Road and US 30 (now US 30 Bus.) in Exton. In 1964, the current divided highway alignment of PA 100 was built between Farmington Avenue in Upper Pottsgrove Township and New Berlinville, which included interchanges at Farmington Avenue, PA 73, and Montgomery Avenue. PA 100 was rerouted to the new alignment between Hanover Street in North Coventry Township and New Berlinville; the former alignment is now Hanover Street, Farmington Avenue, PA 562, and Reading Avenue.
  The northern terminus of PA 100 was extended back to Pleasant Corners at PA 309 in the 1960s, replacing the former US 309 designation between Fogelsville and Pleasant Corners. In the 1960s, the Pennsylvania Department of Highways had plans for an expressway along the PA 100 corridor in Chester County that would connect to US 202 in West Chester. In 1968, a freeway was built connecting PA 100 south of Exton to US 202 north of West Chester. In the 1970s, PA 100 was widened into a divided highway between Exton and Lionville. The freeway connecting US 202 and PA 100 became known as SR 2023 when the Location Referencing System was established in 1987.
  In 2003, the southern terminus of
caption: Old PA 100 in Bechtelsville
exif: {"Image Make": "FUJIFILM", "Image Model": "FinePix AX200", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Digital Camera FinePix AX200 Ver1.07", "Image DateTime": "2011:04:23 10:03:10", "Image YCbCrPositioning": "Co-sited", "Image Copyright": "", "Image ExifOffset": "2346", "Image XPKeywords": "[48, 0, 52, 0, 50, 0, 52, 0, 49, 0, 49, 0, 0, 0]", "Image PrintIM": "[80, 114, 105, 110, 116, 73, 77, 0, 48, 50, 53, 48, 0, 0, 2, 0, 2, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0]", "Image Padding": "[]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "1/96", "Thumbnail YResolution": "1/96", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "24134", "Thumbnail JPEGInterchangeFormatLength": "3566", "EXIF ExposureTime": "1/125", "EXIF FNumber": "18/5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "100", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2011:04:23 10:03:10", "EXIF DateTimeDigitized": "2011:04:23 10:03:10", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "2", "EXIF ShutterSpeedValue": "7", "EXIF ApertureValue": "37/10", "EXIF BrightnessValue": "283/50", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "37/10", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "5", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2048", "EXIF ExifImageLength": "1536", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "23952", "EXIF FocalPlaneXResolution": "3324", "EXIF FocalPlaneYResolution": "3324", "EXIF FocalPlaneResolutionUnit": "3", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0", "EXIF Padding": "[]", "EXIF OffsetSchema": "4140"}