Chicago To Quad Cities Rail Assessment

CHICAGO TO QUAD CITIES at grade RAIL crossing surveys

As part of the High-Speed Intercity Passenger Rail Program of the Illinois Department of Transportation, Prairie Engineers completed topographical surveys of various grade crossings along the Iowa Interstate Railroad (IAIS) between Wyanet, Illinois and Moline, Illinois. Surveys were completed along both the rail corridor and the crossing roadways to assist in the design of proposed improved at-grade crossings.

Topographical surveys were conducted utilizing both highway and rail safety equipment and procedures, including work on active railways under the protection of a railroad flagger. Topographical data was obtained for both rural and heavily urban crossings using robotic total stations and VRS Referenced RTK GPS receivers. The information collected included surface features such as pavements, shoulders, ditches, fences, poles, entrances, ground cover, right of way markers, croplines, buildings, drainage structures, overhead utilities and bridge information within 1,000 feet each side of the grade crossing, in addition to establishing the existing pavement, track and structure centerlines. Permanent horizontal and vertical control points on the Illinois State Plane Coordinate System and NAVD 88 datums were set at each crossing.

Topographical survey drawings, including surface models, were developed using Bentley’s Microstation and Geopak adhering to IDOT CADD standards. Deliverables included the drawing files, ASCII point files, surface models in .TIN format, control points locations, and project photography.

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