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Evaluation of Traffic Responsive Control on the Reston Parkway Arterial Network
(Virginia Center for Transportation Innovation and Research, 2009-02-01), VTRC 09-CR6
Traffic responsive plan selection (TRPS) control is considered an effective operational mode in traffic signal systems. Its efficiency stems from the fact that it can capture variations in traffic patterns and switch timing ...
Access Control Design on Highway Interchanges
(Virginia Center for Transportation Innovation and Research, 2008-01-01), VTRC 08-CR7
The adequate spacing and design of access to crossroads in the vicinity of freeway ramps are critical to the safety and traffic operations of both the freeway and the crossroad. The research presented in this report develops ...
Composite Pavement Systems: Synthesis of Design and Construction Practices
(Virginia Center for Transportation Innovation and Research, 2008-11-01), FHWA/VTRC 09-CR2
Composite pavement systems have shown the potential for becoming a cost-effective pavement alternative for highways with high and heavy traffic volumes, especially in Europe. This study investigated the design and performance ...
Determination of the In-Place Hot-Mix Asphalt Layer Modulus for Rehabilitation Projects Using a Mechanistic-Empirical Procedure
(Virginia Center for Transportation Innovation and Research, 2006-07-01), FHWA/VTRC 07-CR1
This project evaluated the procedures proposed by the Mechanistic-Empirical Pavement Design Guide (MEPDG) to characterize existing hot-mix asphalt (HMA) layers for rehabilitation purposes. Thirty-three cores were extracted ...
Asphalt Materials Characterization in Support of Implementation of the Proposed Mechanistic-Empirical Pavement Design Guide
(Virginia Center for Transportation Innovation and Research, 2007-01-01), VTRC 07-CR10
The proposed Mechanistic-Empirical Pavement Design Guide (MEPDG) procedure is an improved methodology for pavement design and evaluation of paving materials. Since this new procedure depends heavily on the characterization ...
Laboratory Tests for Hot-Mix Asphalt Characterization in Virginia
(Virginia Center for Transportation Innovation and Research, 2005-06-01), VTRC 05-CR22
This project reviewed existing laboratory methods for accurately describing the constitutive behavior of the mixes used in the Commonwealth of Virginia. Indirect tensile (IDT) strength, resilient modulus, static creep in ...
Field Investigation of High Performance Pavements in Virginia
(Virginia Center for Transportation Innovation and Research, 2005-01-01), VTRC 05-CR9
This study evaluated 18 pavement sections located in high-traffic highways in Virginia to find a premium pavement design with a life span of 40 years or more using current and past field experience. The selected pavement ...
Ground-Penetrating Radar Calibration at the Virginia Smart Road and Signal Analysis to Improve Prediction of Flexible Pavement Layer Thicknesses
(Virginia Center for Transportation Innovation and Research, 2005-01-01), FHWA/VTRC 05-CR7
A ground-penetrating radar (GPR) system was used to collect data over the different pavement sections of the Virginia Smart Road from June 1999 until December 2002. Three antennae at different frequencies were used for ...
Evaluation of the Cargill Safelane Surface Overlay
(Virginia Center for Transportation Innovation and Research, 2009-02-01), VTRC 09-R8
A recent development in polymer concrete overlays is the Cargill SafeLane surface overlay (SafeLane overlay). The 3/8-in-thick overlay is constructed with epoxy and broadcast aggregates, as are typical multiple-layer epoxy ...
Experimental Investigation of the Multiple Row Extended 1/2 End-Plate Moment Connection
(2001-12-01)
End-plate moment connections are widely used by the low-rise metal building industry to provide the rigid connections necessary in gable frames. There are numerous end-plate moment connection configurations. The multiple ...