Abstract
The study is aimed at estimating road lighting impa ct on traffic stream characteristics; flow, speed, density and headway for an uninterrupted traffic flow. Volu me, speed and headway data were collected during daylight, road lighting and dry weather conditions. Flowrate, speed, density and headways were estimat ed for daylight and road lighting periods; then compar ed. Since flowrate, free-flow speed, optimum speed critical density and headways during daylight and r oad lighting periods did not differ significantly: the study concluded that road lighting does not affect traffi c stream characteristics significantly.
Highlights
A good highway makes it possible for users to ride safely and comfortably at the design speed day and night
The study is aimed at estimating road lighting impact on traffic stream characteristics; flow, speed, density and headway for an uninterrupted traffic flow
Flowrate, speed, density and headways were estimated for daylight and road lighting periods; compared
Summary
A good highway makes it possible for users to ride safely and comfortably at the design speed day and night. Road lighting provides visibility that helps driver to get enough visual information and makes roadway functional at night. Night time is often characterized by off peak traffic flow and it is unlikely that capacity during road lighting will occur at off peak period except in extra ordinary circumstances like festival, accident and other extreme ambient conditions. Motorway capacity cannot be said to have increased or decreased significantly due to road lighting. The concern of the study is to estimate the volume of vehicles passing a road section and their corresponding speeds, during daylight, road lighting, dry weather and off-peak conditions
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