Center for Multidisciplinary Research in Transportation
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Item AESTHETIC, ENVIRONMENTAL, ANDGEOMORPHOLOGICAL IMPLICATIONS OF CHANNEL MODIFICATIONS(Texas Tech University Department of Civil Engineering, 1998-10) Mollhagen, Tony; Ramsey, Heyward; Lehman, Thomas; Thompson, DavidAs part of roadway construction, TxDOT commonly modifies or relocates stream channels. Depending on the degree and extent of modification, this practice can result in adverse impacts on aquatic and riparian habitats along the affected stream reach. Channel modifications are often undertaken without consideration of their aesthetic impact on the surrounding landscape. State and federal government agencies recognize the ecological importance of stream channel habitats and are charged with their protection. Therefore, alternatives to traditional channel modification are necessary and mitigation measures must be developed where modifications are unavoidable. The existing design guidelines (as given in the TxDOT Design Manual- Hydraulic Volume) contain many qualitative suggestions in this regard, but these need to be more vigorously enforced, more speCific. and more quantitative in nature. The first part of this document comprises a statement of guiding principles or recommendations. These recommendations are based on our review of the pertinent literature regarding these issues (report submitted previously) and field examination of selected problem areas provided by TxDOT. The second part of this document consists of a review of common problems, examples, and suggested procedures. A suggested data collection format to be considered for possible inclusion in future TxDOT Design Manuals is presented under separate cover. In addition. suggested modifications to the design manual to include the principles are presented under separate cover.Item Alternate Vertical Shear Reinforcement in Prestressed Concrete Beams(Texas Department of Transportation, 2002-11) Turkyilmaz, Selim; Cedeno-Rosete, Rafael; Vann, W. Pennington; Burkett, William R.Item Application of Storm Statistics to TxDOT Construction and Stormwater Management Maintenance(Texas Department of Transportation, 2007-08) Fang, Xing; Cleveland, Theodore G.; Thompson, David B.Item Best Practices for Pavement Edge Maintenance(Center for Multidisciplinary Research in Transportation, 2004) Hossian, M. Shabbir; Lawson, William D.Item Best Practices for Pavement Edge Maintenance Research Report(Texas Department of Transportation, 2004-05) Hossain, M. Shabbir; Lawson, William D.Item Capabilities/Limitations and Recommendations for Transporting TxDOT’s Heavy-Duty Off-Road Construction and Maintenance Equipment Fleet(Texas Department of Transportation, 2005-08-31) Leaverton, Michael; Lawson, William D.Item Capabilities/Limitations and Recommendations for Transporting TxDOT’s Heavy-Duty Off-Road Construction and Maintenance Equipment Fleet(Texas Department of Transportation, 2007-03) Leaverton, Michael; Lawson, William D.Item Climatic Adjustments of Natural Resource Conservation Service (NRCS) Runoff Curve Numbers(Texas Department of Transportation, 2003-10) Sandrana, Shiva K.; McLendon, David; Keister, Heather; Harle, H. Kirt; Thompson, David B.Item Climatic Adjustments of Natural ResourceConservation Service (NRCS) Runoff Curve Numbers(2004) Sandrana, Shiva; McLendon, David; Keister, Heather; Harle, Kirt; Thompson, DavidFor the purposes of this project, the term observed curve number (and CNobs) refers to the estimate of effective curve number for a watershed that is derived for paired observations of rainfall depth and runoff depth. Similarly, the term predicted curve number (also CNpred) refers to the standard estimate of the curve number for a watershed for the average antecedent moisture condition (AMC II). The standard curve number (CNpred) is derived from soil association (hydrologic soil group) and land use/land cover through a table look-up procedure.Item Climatic Influence on NCRS Curve Numbers(Texas Department of Transportation, 2000-10) Thompson, David B.Item Constructability Review of Surface Treatments Constructed on Base Courses(Texas Department of Transportation, 2007-03) Vignarajah, M.; Leaverton, Michael; Senadheera, SanjayaItem Constructability Review of Surface Treatments Constructed on Base Courses(Texas Department of Transportation, 2007-02) Vignarajah, M.; Leaverton, Michael; Senadheera, SanjayaItem Construction and Evaluation of Post-Tensioned Pre-stressed Concrete Pavement(Texas Department of Transportation, 2010-01) Won, Moon; Choi, SeongcheolItem Construction and Evaluation of Post-Tensioned Prestressed Concrete Pavement(Texas Department of Transportation, 2009-08-31) Choi, Seongcheol; Won, MoonItem Culvert Rating Guied(Texas Department of Transportation, 2009-08) Jayawickrama, Priyantha W.; Newhouse, Charles D.; Wood, Timothy A.; Lawson, William D.Item Design and Construction Guide for Service Treatments over Base Courses(Center for Multidisciplinary Research in Transportation, 2004) Vignarajah, M.; Senadheera, SanjayaItem Design Guidance for Low-Water Crossings In Areas of Extreme Bed Mobility, Edwards Plateau, Texas(Texas Department of Transportation, 2009-03) Wang, Ken-Han; Fang, Xing; Cleveland, Theodore G.; Thompson, David B.Item Develop a New Testing and Evaluation Protocol to Assess Flexbase Performance Using Strength of Soil Binder(Texas Department of Transportation, 2009-02) Merrick, Michael; Senadheera, Sanjaya; Jayawickrama, PriyanthaItem Develop Statewide Regression Equations for Improved Flood Peak Estimation(Texas Department of Transportation, 2009-08-31) Asquith, William H.; Cleveland, Theodore G.; Thompson, David B.Item Development of Guidelines for Control of Radio-Frequency Interface in Vehicles-Phase ll(Center for Multidisciplinary Research in Transportation, 2004) Trost, Thomas F.