- LIE Traffic and Highway Design
- Hewlett Triangle Traffic Study
- CR46 (William Floyd Parkway)
- SCCC Ammerman Campus Traffic Calming
- Nassau Hub Traffic Study
Traffic and Highway Design at North Service Road, LIE
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Cameron Engineering provided traffic and highway design services for the reconstruction and widening of Miller Place (Interstate 495 North Service Road) at Robbins Lane and at Route 106/107 and the interchange of Northern State Parkway at South Oyster Bay Road in Syosset, NY. The project included the relocation and reconstruction of the Exit 43A highway ramp, elimination of a ramp and the reconfiguration of another ramp on Northern State Parkway, the relocation of a portion of the existing sound wall, relocation of utilities, traffic separation median design, Maintenance and Protection of Traffic plans and introduction of regional shopping mall ingress and egress. The design effort included the modification of five (5) Nassau County DPW traffic signals, one (1) new NYSDOT traffic signal, and two (2) new NCDPW traffic signals and the interconnection of the five (5) traffic signals with Railroad Preemption. Traffic simulation modeling was performed using Synchro for a large complex network of intersections. Drainage improvements, street lighting, landscaping and pedestrian accommodation were a part of the design effort.
Hewlett Triangle Traffic Study
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On behalf of the Nassau County Department of Public Works Traffic Engineering Unit, Cameron Engineering conducted a targeted traffic improvement study to alleviate congestion, streamline traffic flow, improve pedestrian safety/access, and improve the aesthetics at “The Hewlett Triangle” (three intersections on Broadway and West Broadway in Hewlett) and at the adjacent intersection of Broadway at Hewlett Plaza.
Tasks included peak hour traffic counts, accident analysis for the latest 3½-year period, roadway signage/parking restriction/parcel ownership inventory, Synchro 8 traffic analysis for Level of Service, delay, and queue lengths, Conceptual Improvement figures, Parking Yield tables, Cost Estimates, and a written report to summarize all analysis and recommendations.
The required scope included developing three (3) alternatives. Cameron Engineering was able to develop five (5) potential solutions, with associated cost estimates:
- Operational changes only, with no construction (signage and striping)
- Traditional intersection reconfiguration, with minimal property acquisition
- A roundabout centered at the current center-area of the Triangle, with multiple solutions for addressing parking impacts
- A roundabout centered west of the current Triangle area
As of April 2015 this project is in the preliminary survey stages, preparing for highway boundary mapping.
CR46 (William Floyd Parkway) at Surrey Circle
Safety & Traffic Flow Improvements
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This was a Road and Signal Improvement project to eliminate congestion and improve safety at the intersections of Surrey Circle with William Floyd Parkway (CR 46) and Floyd Road. The project design coordinated full depth roadway reconstruction with required drainage improvements and utility coordination. The design incorporated Survey Control drawings to accurately re-establish the Department’s historical vertical and horizontal control data.
Cameron Engineering first conducted manual traffic counts to determine the optimal traffic signal phasing and lane configuration. Field work also included a wet road survey to identify ponding issues, and a walk-through to identify any newer infrastructure which should be retained.
Our design incorporated geometric improvements based on Synchro analysis (new southbound left turn lane, eastbound widening, increased turning radii); pedestrian and drainage improvements (new curbing, sidewalks, ADA-compliant ramps, inventory of existing drainage systems, new drainage structures); traffic signal improvements (added right turn overlaps and signal faces, adjusted signal splits); preparation of contract documents; design-related construction administration services, including line item cost estimates so the Department could easily establish contract bids; and Monthly Cost and Progress Reports throughout the course of the project.
Design documents and monthly reports adhered to Department standards, providing detailed specifications, quantities, estimated construction costs, and project status updates.
Suffolk County Community College, Ammerman Campus Traffic Calming
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Cameron Engineering performed a traffic safety study of this 156-acre, 50-year old, 12,200-student campus. Safety-oriented, pedestrian-oriented, and congestion-oriented retrofits were needed in the face of a historic 15 percent enrollment increase in Fall 2009; the significant increase in traffic and pedestrian volumes worsened existing safety and congestion concerns.
Tasks included College outreach and repeated site visits to identify issues; recommendations for short-, medium-, and long-term solutions each with conceptual plans order of magnitude cost estimates; and prioritizing each solution based on required funding, scheduling, and coordination.
We identified physical and traffic-related features which contribute to poor safety conditions: horizontal and vertical alignment, sight distance at each parking field exit, speed limits, road widths, driveway locations, vegetation, wayfinding signs, accidents, vehicle and pedestrian volumes, pedestrian paths and crossings, speed studies, queuing, and the extent of available parking. We had continuous coordination with College personnel, including several meetings with administration and faculty.
Recommendations included reconfiguration/consolidation/expansion of parking fields, a roundabout, new intra-campus roads, raised crosswalks, a campus shuttle, coordination with Suffolk County Transit to route SCT buses within campus, vegetation clearing, a wayfinding sign program, variable message signs, use of Security personnel for wayfinding, guard booth relocations, driveway closures and relocations, adjusting parking sticker locations, a new entrance on College Road, and geometric improvements on College Road.
Nassau Hub Traffic Study
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Cameron Engineering worked with Nassau County to help determine the optimal new public transit option (known as a “Locally Preferred Alternative”) for the area known as the “Nassau County Hub,” so existing and projected future traffic congestion will not prevent the area from reaching its inherent economic and community potential. The analysis and recommendations were performed to comply with strict FTA (Federal Transit Administration) requirements.
This project involved numerous tasks, the first of which was extensive public outreach: Cameron Engineering arranged and assisted with public outreach by designing and setting up local newspaper advertisements, the project website, and many public meetings.
For the actual documents, Cameron Engineering prepared supporting text and research regarding existing and Year 2035 traffic conditions (vehicles, buses, transit, and pedestrians), environmental conditions, tax base information, and land use. Based on the scoped area of the Hub, Cameron Engineering also analyzed and graphically represented (using GIS and AutoCAD) the comparisons of different alternative new transit options (such as Bus Rapid Transit) along more than 40 different roadway segments. The comparisons accounted for relative cost, physical capacity for installation, stops, and access to major destinations, and their appropriateness with respect to community character. Finally, Cameron Engineering provided ongoing coordination with County representatives.
Cameron Engineering prepared an extensive Traffic and Parking Technical Memorandum to determine the future conditions in 2015, with and without a redevelopment of the Nassau Coliseum and Mitchel Athletic Complex. The redevelopment would include a rebuilt Coliseum, a new 80,000 s.f. multipurpose track and field facility with alternate exhibition hall use, and a new 6,000-seat minor league baseball stadium. The Technical Memorandum involved researching and reviewing multiple sets of record traffic counts at eighteen key intersections, researching multiple growth rate choices, and performing ten 24-hour traffic counts to adjust record data to a June 2011 Existing Condition. Cameron Engineering researched the availability of public transit, and the appropriateness of a “transit credit” for traffic and parking generation. Cameron Engineering then projected conditions to 2015 utilizing data about known other projects and the selected growth factor, with research into two versions of the NYMTC Transportation Improvement Plan. The Build condition focused on the traffic generation and parking demand of the ballpark, after determining that the ballpark would drive the maximum case. All analyses were performed using Synchro software, which complies with the Highway Capacity Manual. The report involved constant coordination with Nassau County DPW.
Cameron Engineering was also responsible for preparing existing and Year 2035 traffic conditions (vehicles, buses, transit, and pedestrians), environmental conditions, and land use.
Following a screening process which resulted in two modern streetcar and two premium bus alignments, Cameron Engineering prepared detailed alignment drawings and sections for these two remaining alternatives. Once the Locally Preferred Alternative (LPA) is selected, Cameron Engineering is responsible for preparation of major sections of the Environmental Impact Statement for the LPA.