US 259 Alignment Study McCurtain County
Client: ODOT
Project Type: Environmental Study, Alignment & Traffic Analysis
About this Project
US Highway 259 (US-259) is a two-lane, rural principal arterial route running from northeastern Texas to southeastern Oklahoma. Due to the severe horizontal and vertical alignment issues and environmental challenges on a 19.6-mile portion in McCurtain County, the Oklahoma Department of Transportation (ODOT) tasked our team to develop an alignment study addressing safety, mobility and capacity concerns. Preliminary environmental and engineering studies were conducted in support of a National Environmental Policy Act (NEPA) evaluation, and our team accomplished five primary goals:
- Compiling engineering and environmental related concerns and constraints;
- Reviewing the existing US-259 alignment for deficiencies;
- Assessing the effects of improving the existing alignment;
- Proposing three new alignments as possible alternatives;
- Evaluating the alignment provided by ODOT.
The study addresses improvement solutions that include enhancing the existing alignment, proposing four alternative roadway alignments and analyzing the alignment provided by ODOT. EST analyzed the existing route and researched maps, reports, previous studies and gathered public opinions in order to accurately address potential concerns and constraints.
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