TRANSPORTATION
Traffic Engineering:

Ledgestone Drive/Illinois Route 159 Turn Lane




PROJECT NAME: Ledgestone Drive/Illinois Route 159 Turn Lane
CLIENT: Smithton Development Company, LLC
JURISDICTION: Village of Smithton and State of Illinois
LOCATION: Smithton, St. Clair County, Illinois
CONSTRUCTION COST: $239,000
YEAR COMPLETED: 2008
PROJECT DESCRIPTION: The Smithton Development Company, LLC employed our firm to prepare the Traffic Study, Intersection Design Study (IDS) and Construction Plans and Specifications for the intersection of a new subdivision entry roadway (Ledgestone Drive) intersecting an existing State Highway (Illinois Route 159).   All phases of the project were subject to Illinois Department of Transportation review for compliance with standard policies and procedures.  The Traffic Study was prepared using the Trip Generation Manual to develop traffic forecasts.  The IDS was completed using Highway Capacity Software (HCS) and IDOT design policies.  The analyses concluded that a left-turn lane was warranted on Illinois Route 159 at the Ledgestone Drive entrance. Turning movements and corner radii were developed using AUTOTURN software for the appropriate design vehicle, and the intersection sight distance was checked.  The construction scope included hot-mix asphalt pavement widening, hot-mix asphalt shoulders, ditching, drainage culverts, thermoplastic pavement markings and driveway removal and replacement.  Our firm was also retained to provide construction inspection and materials testing services.



Transportation Areas of Service:
Roads & Streets
Traffic Engineering
Planning / Funding Applications
Recreational Facilities
Construction Inspection


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