Nevada Department of Transportation
Home MenuReturn to Blog
12/12/2017 9:19 AM
Developing a Quality of Signal Timing Performance Measure Methodology for Arterial Operations
Agreement no. 607-17-803 (expires 02/29/2020)
While various performance measures for freeway operations have been well established and are relatively mature, methodologies for establishing arterial performance measures are still being sought by transportation agencies in the nation. In Nevada’s urban areas, signalized arterials carry nearly 40% of the total VMTs, thus they play a critical role in the overall transportation system’s efficiency. Unlike freeways where limited engineering solutions (e.g., ramp metering) can be applied, arterial performance can be significantly affected by the quality of signal timing and coordination, one of the most cost-effective engineering solutions. One of the urgent needs in both Nevada and the nation is to establish performance measures criteria, which can be used to judge the quality of signal timing and coordination along major arterials.
Lateral Analysis Guidelines for Drilled Shafts in Nevada Based on LRFD Framework
Agreement no. 608-17-803 (expires 08/31/2021)
Current LRFD specifications offer vague guidance on the lateral stability requirements and analytical modeling techniques for deep foundations. NDOT uses drilled shafts for bridge foundations. Simplified methods for analytically modeling deep foundations do exist; however, they suffer from several drawbacks. Design guidelines with appropriate recommendations for lateral analysis and lateral stability need to be developed for NDOT to account for local soil conditions, design practices, and foundation dimensions commonly encountered within the state. A reliable method is needed to ensure accurate, economical, and safe deep foundation designs, specifically drilled shafts, as well as to ensure uniformity in the design approach and desired lateral performance across the state.
Two new research projects announced
Updated: 12/12/2017
Agreement no. 607-17-803 (expires 02/29/2020)
While various performance measures for freeway operations have been well established and are relatively mature, methodologies for establishing arterial performance measures are still being sought by transportation agencies in the nation. In Nevada’s urban areas, signalized arterials carry nearly 40% of the total VMTs, thus they play a critical role in the overall transportation system’s efficiency. Unlike freeways where limited engineering solutions (e.g., ramp metering) can be applied, arterial performance can be significantly affected by the quality of signal timing and coordination, one of the most cost-effective engineering solutions. One of the urgent needs in both Nevada and the nation is to establish performance measures criteria, which can be used to judge the quality of signal timing and coordination along major arterials.
Lateral Analysis Guidelines for Drilled Shafts in Nevada Based on LRFD Framework
Agreement no. 608-17-803 (expires 08/31/2021)
Current LRFD specifications offer vague guidance on the lateral stability requirements and analytical modeling techniques for deep foundations. NDOT uses drilled shafts for bridge foundations. Simplified methods for analytically modeling deep foundations do exist; however, they suffer from several drawbacks. Design guidelines with appropriate recommendations for lateral analysis and lateral stability need to be developed for NDOT to account for local soil conditions, design practices, and foundation dimensions commonly encountered within the state. A reliable method is needed to ensure accurate, economical, and safe deep foundation designs, specifically drilled shafts, as well as to ensure uniformity in the design approach and desired lateral performance across the state.