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The county name is within the dividing line, the mileage from the county line is in the lower half and the inventory or route number in the upper. Number series vary between IDOT Districts, in some areas the number used on otherwise unnumbered routes are a derivative of the former number (i.e.: "913" used on a section of former IL 13) or a ...
Bridge weight plates refer to SBI numbers instead of posted route numbers as well. For example, bridge plates along old US-66 refer to the route as "SBI-4" When the United States Numbered Highway System was started in 1926, the US numbers were just tacked onto the existing IL/SBI number unless the US Route was routed along a new route.
Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes Temp. US 6 — — Moline: Joliet — — US 6 Bus. — — Lansing: Illinois–Indiana state line — — City US 12 — — — — 1938: 1960 Served Chicago: US 12 Bus. — — — — 1960: 1968 Served Chicago: US 20 Bus. — —
The Illinois Department of Transportation (IDOT), Illinois State Toll Highway Authority (ISTHA), and Skyway Concession Company (SCC) are responsible for maintaining these highways in Illinois. The Interstate Highway System in Illinois consists of 13 primary highways and 11 auxiliary highways which cover 2,248.93 miles (3,619.30 km). [2]
Given are the years of the first and last official maps the routes appear on (or when the route was legislated, in the case of SBI routes: original 1917 definitions, approved by voters in 1918; 47-185 from 1923 (pp. 258-268), approved in 1924). These are not always the exact years the routes were created or eliminated.
The shorter auxiliary routes branch from primary routes; their numbers are based on the parent route's number. All of the supplement routes for Interstate 95 (I-95) are designated with a three-digit number ending in "95": I-x95. With some exceptions, spur routes are numbered with an odd hundreds digit (such as I-395), while bypasses and ...
Pennsylvania Route 54; Pennsylvania Route 87; Pennsylvania Route 118; Pennsylvania Route 184; Pennsylvania Route 239; Pennsylvania Route 284; Pennsylvania Route 287; Pennsylvania Route 405; Pennsylvania Route 414; Pennsylvania Route 442; Pennsylvania Route 554; Pennsylvania Route 654; Pennsylvania Route 664; Pennsylvania Route 864; Pennsylvania ...
Pennsylvania Route 654 (designated by the Pennsylvania Department of Transportation as PA 654) is an 11.7-mile-long (18.8 km) state highway located in Lycoming County in Pennsylvania. It is known as West Southern Avenue and Riverside Drive in South Williamsport and Riverside Drive and Euclid Avenue in Duboistown .