道路工程外文翻译--高桅杆照明系统.docVIP

外文翻译 原文： ABSTRACT This paper discusses the implementation of semi-permanent, high-mast pole-mounted lighting for nighttime road work construction and maintenance based on an installation along Interstate 90 in Albany, New York. The high-mast lighting system met state lighting performance specifications. There were no recorded accidents at the site during the construction period. Although this is largely attributable to roadway closures allowed during part of the project, the consensus of the contractor and transportation agency is that the lighting contributed at least in part to an increase in safety. The cost of the high-mast lighting system was approximately 16% higher than the estimated cost of the portable light towers. Despite the higher estimated cost of the high-mast lighting system, the economic and societal benefits appear considerable in this particular location, namely an urban, heavily traveled throughway. In particular, this lighting approach probably allowed the duration of the construction period to be shortened, leading to a reduction in worker and driver risk exposures and to a reduction in traffic delays for motorists. An approach to identifying projects where this lighting technique might be warranted is presented. INTRODUCTION Semi-permanent, high-mast (70 ft.) pole-mounted fixtures were used by a construction contractor hired by the New York State Department of Transportation (NYSDOT) to illuminate nighttime road work construction and maintenance along a three-mile stretch of Interstate 90 (I-90) in Albany, N.Y., as an alternative to the more common portable light towers (1). The high-mast lighting was installed prior to construction work and removed after the construction project was completed, about seven months later. Freyssinier et al. (2) documented the high-mast lighting system and its performance in terms of photometric performance, visibility and glare. The high-mast lighting system was found to have performed well and as intended. Th