We present the general design of a system to control urban street traffic signals. It is based on cooperating, learning, realtime, distributed expert systems. We also describe the operation of a running prototype program which, while using several simplifying assumptions, has proven the technical feasibility of the approach. It has also attained a 36% improvement in the traffic flow under non-s...

To solve the problem in pedestrian Mid-Block street crossing, the method of signal coordination control between mid-block street crossing and intersection is researched in this paper. The paper proposes to use “distance-flow rate-time” graph as the tool for building coordination control system model which is for different situations of traffic control. Through alternating the linear optimizatio...

For the purposes of both traffic-light control and the design of roadway layouts, it is important to understand pedestrian street-crossing behavior because it is not only crucial for improving pedestrian safety but also helps to optimize vehicle flow. This paper explores the mechanism of pedestrian street crossings during the red-man phase of traffic light signals and proposes a model for pedes...

Experiments concerning a full-scale demonstration of air purifying pavement in Hengelo, The Netherlands, are reported. The full width of the street was provided with concrete pavement containing TiO₂ over a length of 150 m ("DeNOx street"). Another part of the street, about 100 m, was paved with normal paving blocks ("Control street"). The outdoor monitoring was done during 26 days for a period...

street dusts are suspended particle matters in the air from different natural and anthropogenic sources that may fall out because of their size and density. forty nine street dust samples were collected from some main streets of eastern and southern parts of tehran. one other sample was also collected from iran university of science and technology central campus for comparisons during summer un...

This paper presents the simulation of traffic flow on a congested street in the Jordanian capital Amman. The geometry, boundary conditions and assumptions were also compared against videos taken for actual traffic on the street. Although limited changes to the geometry is applicable in reality, some recommendations on speed limits and traffic signs were made to aid in reducing traffic jams. Key...

The Problem Urban areas face increasingly acute vehicular traffic congestion. Current methods for measuring traffic flow on a real-time basis are antiquated and limited in their capacity to assess traffic dynamics. Buried inductive loop detectors at intersections are extensively used in the USA and Europe to measure traffic speed, occupancy and volume on freeways and arterials. The data obtaine...

BACKGROUND Associations between traffic pollution on the street of residence and a range of respiratory and allergic outcomes in children have been reported in developed countries, but little is known about such associations in developing countries. METHODS The third phase of the International Study of Asthma and Allergies in Childhood (ISAAC) was carried out in 13- to 14-year-old and 6- to 7...

The principles of constructing intelligent unmanned traffic control systems for off-street urban rail transport are considered, while a block diagram and connections between subsystems proposed. features the construction upper-level algorithms shown. Functional defined, links considered.