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Mash Test 3-11 of the TxTOT T222 Bridge Rail

Description: "The objective of this research was to evaluate the impact performance of the TxDOT Type T222 Bridge Rail according to the Manual for Assessing Safety Hardware (MASH) TL-3.
Date: July 2016
Creator: Williams, William F.; Bligh, Roger P. & Menges, Wanda L.
Partner: UNT Libraries Government Documents Department

Manual for Assessing Safety Hardware test 3-11 on the Texas T101 bridge rail

Description: The Texas T101 bridge rail is widely used in the state of Texas. Previous testing demonstrated its ability to contain and redirect passenger cars and a 20,000-lb school bus. Based on this testing, the Federal Highway Administration accepted the T101 bridge rail as an NCHRP Report 350 TL-3 barrier. However, its impact performance with pickup trucks was never evaluated. Under research project 0-5526, Impact Performance of Roadside Safety Appurtenances, researchers conducted a performance assessment of Texas roadside safety devices to help evaluate the impact of adopting the new AASHTO Manual for Assessing Safety Hardware (MASH) guidelines on current hardware. Testing and evaluation of the T101 bridge rail was recommended as a high priority. This recommendation was based primarily on the absence of pickup truck testing on the system, and concerns that the 27-inch rail height may not be compatible with pickup trucks and SUVs under design impact conditions. The T101 bridge rail did not meet MASH evaluation criteria for test 3-11. The vehicle overturned after losing contact with the barrier.
Date: March 2011
Creator: Bligh, Roger P. & Menges, Wanda L.
Partner: UNT Libraries Government Documents Department

Development guidance for sign design standards

Description: "This two-year project was designed to provide TxDOT with comprehensive review and update of mounting details and standards for large and small sign supports, and to provide a mechanism for TxDOT to quickly and effectively evaluate and address high priority needs related to sign support systems."
Date: November 2011
Creator: Silvestri, Chiara; Arrington, Dusty R.; Bligh, Roger P. & Menges, Wanda L.
Partner: UNT Libraries Government Documents Department

Manual for Assessing Safety Hardware test 3-10 on 31-inch W-beam guardrail with standard offset blocks

Description: "The test reported herein corresponds to American Association of State Highway and Transportation Officials (AASHTO) Manual for Assessing Safety Hardware (MASH) test 3-10. This is primarily a severity test that assesses risk of injury to the vehicle occupants."
Date: November 2010
Creator: Abu-Odeh, Akram Y.; Menges, Wanda L. & Bligh, Roger P.
Partner: UNT Libraries Government Documents Department

On-going evaluation of traffic control devices

Description: "This project was established to provide a means of conducting small-scale research activities on an as needed basis so that the results could be available within months of starting the specific research. This report summarizes the small-scale research activities that were conducted between September 2008 and August 2009."
Date: November 2009
Creator: Carlson, Paul J.; Bligh, Roger P.; Pike, Adam; Miles, Jeffrey D. & Paulus, Susan
Partner: UNT Libraries Government Documents Department

Determination of minimum height and lateral design load for MASH test level 4 bridge rails

Description: "This research had the objectives of determining the minimum rail height and lateral design impact load for MASH test level 4 bridge rails. Using parametric finite element analysis and subsequent crash testing, the researchers determined the minimum recommended rail height for MASH TL-4 impact conditions to be 36 inches. Later Design impact for MASH TL-4 test conditions was determined to be 80 kips."
Date: October 2011
Creator: Bligh, Roger P.; Menges, Wanda L. & Sheikh, Nauman Mansoor
Partner: UNT Libraries Government Documents Department

MASH test 3-37 of the TxDOT 31-inch w-beam downstream anchor terminal

Description: Report discussing the findings of a study into issues related to roadside safety devices: "The objective of this study was to develop a suitable replacement for the downstream 'turn-down' guardrail anchor system. The 'turn-down' guardrail anchor system does not meet mandated test requirements under MASH for upstream anchor application terminals; however, it does meet downstream requirements for previous crash testing standard" (abstract). It includes background information, system details, test requirements and evaluation criteria, crash test procedures, crash test results, and conclusions.
Date: October 2011
Creator: Bligh, Roger P.; Menges, Wanda L. & Arrington, Dusty R.
Partner: UNT Libraries Government Documents Department

MASH test 3-11 on the 5-inch cast in place deck barrier anchors

Description: "A full-scale crash test was performed to evaluate the impact performance of a Texas T223 concrete beam and post bridge rail anchored to a 5-nch cast-in-place deck (CIPD). The testing followed the MASH standards for Test Level 3 ( TL-#) longitudinal barriers. The test performed was American Association of State Highways and Transportation Officials (AAHSTO) Manual for Assessing Safety Hardware (MASH) test 3-11, which involves a 2270P (500 lb) pickup truck impacting the critical impact point (CIP) of the barrier at a nominal impact speed and angle of 62 mi/h and 25degress, respectively. This test evaluated the strength of the barrier and its anchorage to the 5-inch CIPD."
Date: October 2011
Creator: Bligh, Roger P.; Menges, Wanda L. & Arrington, Dusty R.
Partner: UNT Libraries Government Documents Department

Development of a MASH TL-2 guardrail-to-bridge rail transition compatible with 31-inch guardrail

Description: The TxDOT Design Division is in the process of developing new guardrail standards that comply with the AASHTO Manual for Assessing Safety Hardware (MASH). The new guardrail system will provide increased capacity and improved impact performance relative to the current design. A key feature of the new system is an increased in rail mounting height from 27 inches to 31 inches. TxDOT's current TL-2 metal beam transition is 27 inches tall and is not compatible with the new 31 inch guardrail system. While the high-speed, nested thrie beam transition system meets MASH guidelines and is compatible with a 31-inch guardrail, it would be cost-prohibitive to use it on all roadways. The objective of this research was to develop a transition that is suitable for use on lower speed roadways, less expensive and complex than the current high-speed (i.e., TL-3) transition design, and is compatible with a 31-inch guardrail. A low-cost guardrail-to-bridge rail transition was successfully developed and tested under MASH Test Level 2 conditions. It is compatible with a 31-inch guardrail and can connect to rigid concrete bridge rails. It is considered suitable for implementation on roadways that have traffic conditions appropriate for the use of TL-2 safety hardware. Use of this system provides significant savings in material and installation cost compared to the high speed transition system.
Date: December 2011
Creator: Bligh, Roger P.; Arrington, Dusty R. & Menges, Wanda L.
Partner: UNT Libraries Government Documents Department

Temporary Large Guide Signs

Description: This is a report on research to establish a critical design configurations for temporary guide signs to save time and costs.
Date: May 2014
Creator: Texas A&M Transportation Institute Proving Ground
Partner: UNT Libraries Government Documents Department

Skid-Mounted Support System for Temporary Guide Signs

Description: This is a research report to establish guidelines for both the direct embedded temporary wood support system and the skid-mounted support system. Tests covered in the report look at wind loads, ballast requirements, and impact performance.
Date: November 2014
Creator: Bligh, Roger P.; Arrington, Dusty R.; Menges, Wanda L. & Kuhn, Darrell L.
Partner: UNT Libraries Government Documents Department

Project Summary: Testing of Alternative Supporting Materials for Portable Roll-Up Signs Used for Maintenance Work Zones

Description: Summary sheet describing research performed by Texas Tech University Multidisciplinary Research in Transportation (TechMRT) regarding testing alternative supporting materials for portable roll-up signs used for maintenance work zones.
Date: 2013-08-31~
Creator: Texas Tech University. Center for Multidisciplinary Research in Transportation.
Partner: UNT Libraries Government Documents Department

Development of a MASH TL-3 median barrier gate

Description: Report regarding a median barrier gate designed to both offer protection to motorists and easier cross-median access for emergency and maintenance vehicles.
Date: February 2011
Creator: Bligh, Roger P.; Arrington, Dusty R.; Sheikh, Nauman Mansoor; Silvestri, Chiara & Menges, Wanda L.
Partner: UNT Libraries Government Documents Department