The Highway Capacity Manual (HCM, 1985) has defined level of service mostly for the developed countries having predominant contribution of motorized vehicles. There are very fewer number of models to simulate the urban heterogeneous traffic flow having significant proportion of non-motorized vehicles. These types of flows are mostly observed in the countries of Asia-Pacific region. The flow of ...

Inductance loop detection systems serve as a primary data source to contemporary traffic information systems. Measures like 20-second or 30-second average velocity, flow, and lane occupancy can be aggregated from individual loop detector actuation sampled at 60 Hz typically. Practically, these measures would sometimes be further aggregated into a much lower, e.g. 15-minute, resolution and then ...

Travel speed is a key measure of effectiveness for evaluating urban arterials. The Highway Capacity Manual (HCM) methodology of predicting speeds along urban streets requires complex calculations and input not typically available in long-range planning, thereby requiring the use of default values. This paper demonstrates that a simple and practical method of estimating travel speed along urban ...

Operations-oriented traffic signal performance measures are important for identifying the need retiming to improve operations. Currently, most obtained from high-resolution controller event data, which provides information on an intersection-by-intersection basis and requires significant initial capital investment. Over 400 billion vehicle trajectory points generated each month in United States...

Adaptive cruise control (ACC) systems are currently being developed by automotive manufacturers for highway vehicle automation [3],[4]. An ACC system enhances regular cruise control by using an on-board radar to maintain a desired spacing from a preceding vehicle that has been detected in the same lane on the highway. The firstgeneration ACC systems are currently available in Japan and Europe a...

The Transportation Research Forum, founded in 1958, is an independent, nonprofit organization of transportation professionals who conduct, use, and benefit from research. Its purpose is to provide an impartial meeting ground for carriers, shippers, government officials, consultants, university researchers, suppliers, and others seeking exchange of information and ideas related to both passenger...

Transportation Research Record: Journal of the Transportation Research Board, No. 1988, Transportation Research Board of the National Academies, Washington, D.C., 2006, pp. 63–66. The analytical procedures for all-way stop-controlled intersections in the 2000 edition of the Highway Capacity Manual (HCM) lack a model to estimate the 95th percentile queue length. This is considered a major shortc...

The need for reliable performance measures of urban arterial corridors is increasing because the rise in traffic congestion and high value users’ travel time. Consequently, time reliability (TTR), which attempts to capture day-to-day variability times, has recently received considerable research interest. basis all TTR metrics underlying distribution (TTD) along given link or corridor. Estimati...

Over the past centuries, millions of bridge infrastructures have been constructed globally. Many those bridges are ageing and exhibit significant potential risks. Frequent risk-based inspection maintenance management highway is particularly essential for public safety. At present, most rely on manual methods management. The efficiency extremely low, causing risk deterioration defects to increas...

The correct saturation flow rates for the specific circumstances must be used to calculate delays and level of Service at intersections. As a result lack local data, practitioners would often use default values from overseas software developers. Base rate is an important factor timing traffic signals. Despite 1, 900 pc/h/ln number suggested by Highway Capacity Manual (HCM), base differs city ci...