TRAFFIC ENGINEERING
County Route 80 Traffic Engineering Services Suffolk County Department of Public Works
LiRo-Hill completed preliminary and final design (Phases I-IV) for improvements to a 1.7-mile section of this heavily travelled Suffolk County arterial. Several alternatives, including maintaining the existing roadway configuration, widening the roadway, and installing roundabouts and raised medians, were studied. Future traffic projections were made by extrapolating data from the NYSDOT LITP 2000 Trans Plan Model. Traffic analysis was completed utilizing HCS and SYNCHRO software programs; VISSIM and RODEL were utilized to study the roundabouts and to generate animated traffic simulations of existing and future conditions. The final design included pavement rehabilitation; positive storm drainage systems; intersection improvements; traffic signal replacements; and concrete curbs and sidewalks.
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