In an on-going research project with the NJDOT, we have instrumented an integral bridge and have been gathering data every two hours for the past two years. We found that there is a significant pressure built-up in the soil behind the abutment. We have reported the built-up to the NJDOT, however our project does not allow for an in-depth analysis of the mechanics that are responsible for the development of the high pressures.
Bridge engineers in New Jersey are presented with numerous tidal flow and non-tidal scour countermeasure designs for application to scour critical bridges. This handbook presents recommended guidelines for scour countermeasure design and planning for bridges in New Jersey. The handbook has been prepared on the basis on an extensive review of all available literature on scour countermeasure for bridge foundations. The presented guidelines are based on recommendation in HEC-23, HEC-18, NCHRP 24-07 and CIRIA Manual.
This report summarizes the work conducted to analyze the site impact of freight villages. The analysis included assessing traffic, logistics and economic impacts, which are then used to determine the extent to which freight village development has the potential to assist in NYMTC’s regional objectives.
This report presents the findings of the simulation model for a self-organized transport system where traffic lights communicate with neighboring traffic lights and make decisions locally to adapt to traffic conditions in real time. The model is inspired by the behavior of social insects which exhibit sophisticated collective behavior despite having limited individual abilities. The initial results show an improvement in average vehicle delay for the self-organized traffic system compared to some of the other basic traffic control schemes.
Quality assurance is an important component of concrete construction. In most cases the quality of concrete is assessed using 28 day companion cylinder strengths Because corrections cannot be done economically after 28 days, the quality of concrete is always monitored at earlier stages. The most widely used quality control measure of plastic concrete is slump. The other measures are air content and wet density.
Power outages affect traffic signalized intersections, leading to potentially serious problems. Current practices of responding to power failures are very basic, ranging from ‘do nothing’ to installing portable generators. The purpose of this research project was to provide the NYSDOT with a better understand the practices of other agencies in dealing with dark traffic signals and to develop guidelines for instrumenting uninterrupted backup power at intersections across the state.
We investigate the role of the built environment in mode choice decisions for home-based work tours in the New York Metropolitan Region. The analysis is conducted using a multinomial logit model. There are two main results of this study. First, the built environment influences people’s mode choice decisions, even after controlling cost variables. Population and employment densities have explanatory power, so do the variables measuring the access distance between the nearest mass transportation facility and a stop in the tour. Second, tour characteristics do affect mode choices.
Infrastructure system components such as bridges, highways, tunnels, traffic systems, road pavements, and other systems are considered assets that should be protected and properly managed. Yet, the degree of deterioration and the risk of exposure to natural (e.g., earthquakes, floods, etc.) as well as malicious disasters are dangerously high. Major decisions must be made to allocate the available but limited funds for maintaining and safeguarding our national infrastructure.
The project will help NYSDOT and NYCDOT better quantify and predict the non-recurring delay (NRD) from incidents on the City?s highway network. NRD is a substantial portion of the total delay that occurs within the City and it can be mitigated through various actions. If NYSDOT and NYCDOT can better predict NRD and trace it to the causing factors, they can take actions to reduce it. Those actions range from TSM and ITS measures to geometric changes and capacity investments.
