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Use of Multifrequency Backcalculation for Determining Moduli of a Pavement St…
The use of multifrequency backcalculation can overcome the limitation on the maximum allowable number of layers in most static backcalculation programs. However, its convergence may break down when using high-frequency deflections with static estimation. Based on the dispersive characteristics of the surface waves, a newly developed procedure for estimating the seed moduli was implemented. The …
Bus actuated signal control at isolated intersections - simulation studies of…
Trrl Lr 814 Normal traffic signal operation can be modified to give buses priority, if buses are detected separately from other vehicles. A computer simulation has been used to estimate benefits to buses and disbenefits to other traffic when using various forms of priority control superimposed upon the normal UK vehicle-actuated signal operation. All the cases simulated were for two-stage si…
Nottingham zones and collar study - overall assessment
Morning peak commuter traffic leaving two suburban residential areas (zones) was confined to certain exit roads where traffic signals controlled the rate at which traffic joined the main road network. On the main radial roads, traffic travelling towards the city was delayed at traffic signals forming a partial 'collar' around the central area. Buses avoided delays at zone exits by using bus-onl…
Car sharing and car pooling in Great Britain: the recent situation and potential
Trrl Lr 893 This report reviews the character of passenger travel by car in Great Britain using, in particular, results derived from the National Travel Survey 1975/76. Car passenger who travel in car belonging to another family account for as many passenger kilometres as all stage-carriage bus services. Car-poolers, who take it in turns to drive their own car and give lifts to others in the…
User guide to TRANSYT version 8
TRANSYT is a method of finding, and studying, the 'best' fixed time plans with which to coordinate the traffic signals in any network of roads for which the average traffic flows are known. This report summarises the principles of the TRANSYT traffic model and of the signal optimiser, and gives details of the data input and output formats for version 8 of the computer program which implements t…
Calculating Paveement Deflections with Velocity Transducers
An overview of the varioua procedures required to accurately calculate these deflections is provided. A three-part study has been conducted: theoretical modeling of the transducer response, laboratory calibration of the transducer response, and comparison of independentlc determined deflections with those from an impulse loadinU test. referred to as a falling weight deflectometer.
