Subway demand in NYC has been on the rise, reaching 1.8 billion trips in 2014. Overcrowding delays have extended to non-peak hours and weekends; weekend overcrowding delays grew 141.2% in 2014-2015 (NY Daily News, 2015). In addition to delays, nonmonetary crowding costs include discomfort and a loss in security that play against overall perceptions of public transportation. In fact, subway crime has also been on the rise (NY Daily News, 2015).

This research has two objectives:

1) To develop algorithms for plausible and legallyjustifiable freeway car-following and arterial-street gap acceptance driving behavior for AVs

2) To implement these algorithms on a representative road network, in order to generate representative drive cycles for AVs that are both theoreticallygrounded and based on empirical driving conditions.

Adverse weather conditions have a significant impact on the safety, mobility, and efficiency of highway networks. Annually, 24 percent of all crashes, more than 7,400 roadway fatalities, and over 673,000 crash related injuries were caused by adverse weather conditions between 1995 and 2005. These safety and mobility factors make it important to develop new and more effective methods to address road conditions during adverse weather conditions.

Unmanned aircraft systems (UAS) and unmanned ground systems (UGS) have the potential to change the way a number of transportation-related operations are conducted. Nowadays, an opportunity arises to leverage various innovative technological capabilities to explore their use and value in real wor1d operating environments. Specifically, UAS, also called drones and UGS appear to have significant potential in several transportation areas which are examined in this report.

In the field of transportation planning and engineering, the activity-based approach continues to generate interest in terms of model development and implementation. The Household Activity Pattern Problem (HAPP), is a mathematical programming approach to travel analysis under the activity-based framework. According to HAPP, activity travel patterns are the result of a household optimization with respect to a set of space-time and resource constraints, where the objective function represents travel (dis)utility.

Public-private partnerships (PPPs) in transportation infrastructure projects refer to contractual agreements formed between a public Agency and a private sector entity to allow for greater private sector participation in project delivery. At the current time, most Agencies do not have a set of straightforward guidelines by which they decide whether to adopt PPP for a given project, and if to adopt one, which type of PPP should be adopted.

Alkali-activated concrete (AAC) is an emerging technology in the construction materials sector. Being cement-free, AAC is a promising environmentally-friendly alternative to ordinary portland cement (OPC) concrete. Despite the improved performance and sustainability of AAC that has been established through various studies, some major technical challenges still remain in its realization as a viable construction material. One of them is the uncertainty with respect to the alkali-silica reactivity (ASR) durability performance of AAC.

Purpose: Develop a fully-immersive truck driving simulator using Virtual Reality to assess the truck driver’s level of fatigue typically experience during real-life varying driving conditions.

Background: Driver fatigue is a significant contributing factor to numerous fatal traffic crashes resulting in death or injury every year. Fatigue is invisible and there is no single symptom that can be exclusively identified to assess it in advance.

Between 1981and 2011, the State of Florida and private corporations, sometimes jointly, sometimes alone, made four different attempts to implement very high speed rail lines between Miami, Orlando, and Tampa, on which trains would run at very high speed, between 150 and 220 miles per hour. Yet, at present, the only new passenger line that is likely to begin operations between these cities is not very high speed, and will not run on dedicated track. Why did all the earlier attempts at very high speed lines fail, while a moderate speed line appears likely to succeed?

This study examined the performance of curved weathering steel bridges in fire. Bridge fires can present a severe hazard to the transportation infrastructure system. In fact, a nationwide survey by the New York State Department of Transportation (NYSDOT) has shown that fires have collapsed approximately three times as many bridges as earthquakes. Bridge fires are often intense as they may be fueled by gasoline from vehicles that have crashed in the vicinity of the bridge.