The effect of roadway surface conditions on traffic speed during day and night operations /
| Main Author: | |
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1989.
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| Subjects: | |
| Online Access: | ProQuest, Abstract Link to OAKTrust copy |
| Abstract: | This dissertation documents the process used to quantify the relationship between traffic speed and roadway surface conditions. To estimate the effect of pavement roughness on traffic speed, substantial amounts of speed data were collected during day and night operations on carefully selected sample streets before and after the pavement of these streets were overlayed. Existing levels of roughness on each selected street was measured and expressed in terms of a numerical indicator called PCI. Stringent criteria were followed in choosing the studied streets and in conducting the experiment, in order to isolate and measure the relationship between speed and pavement roughness. Collected data were used to develop models to measure the expected increase in traffic mean speed during the day and at night on a particular street under a specific level of roughness if this street will be overlaid. The resulting change in traffic mean speed and level of pavement roughness, was used to describe the exact type of relationship between pavement roughness and traffic speed. The effect of land use type on traffic speed was investigated by including a residential land use variable in the models. A comparison between the effect of pavement roughness during day and night operations was also analyzed. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Urban and regional science." |
| Physical Description: | xiii, 164 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |