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TRAFFIC ENGINEERING

SERVICE OVERVIEW

SIMCO’s traffic engineering expertise includes highway safety investigations, traffic signal design, pavement markings, and signing. SIMCO has extensive experience in maintenance and protection of traffic/work zone traffic control design and peer review for public agencies and contractors.

FEATURED PROJECTS

Kosciuszko Bridge Replacement Project consists of two separate phases to replace the current span, which is comprised of two separate bridges: an eastbound structure and a westbound structure. Phase I consisted of the construction of the eastbound main span and approach structures adjacent to the existing structure and the reconstruction of the connector roadways.

The new eastbound main span, reconstruction of the connector roadways, and opening of two way traffic along the eastbound main span are now complete.

Phase II, expected to be completed under a different contract, will consist of the construction of the westbound main span.

SIMCO provided the traffic engineering support for the project during Phase 1 of construction. The scope of work included collecting and recording complete inventories of existing project-area traffic signals, lighting, signing, reviewing, designing, and obtaining approval for the proposed modifications to the Detour Plans.

Additionally, SIMCO designed all temporary and permanent traffic signals as well as the Brooklyn-Queens Expressway (BQE) and local street lighting impacted by construction. SIMCO prepared pavement marking and signing design along the BQE and local streets.

The Kosciuszko Bridge Replacement Project is a Design/Build project contract.

SIMCO’s scope of work included the design and coordination of detailed Maintenance and Protection of Traffic (MPT) plans in support of structural bridge repairs at over 70 locations in three boroughs. These repairs addressed critical bridge deficiencies and “red flags” discovered during routine bridge inspections.

In addition to local streets, projects were located along the Van Wyck Expressway (I-678), Long Island Expressway (I-495), Gowanus Expressway (I-278), Belt Parkway, Clearview Expressway (I-295), Grand Central Parkway, Cross Island Parkway, and Jackie Robinson Parkway.

The work zone traffic control/MPT design involved temporary and long term lane closures to address construction staging. Traffic operations impacts during construction were assessed to maximize safety and operations and minimize inconvenience to the public. In addition to typical traffic control devices layout, measures were implemented for complex ramp/intersection alignments, traffic detours, and ramp closures.

SIMCO also provided coordination with NYSDOT, NYCDOT OCMC, and other stakeholders. All plans were prepared in accordance with the MUTCD and NYSDOT/NYCDOT supplements.

SIMCO, as a subconsultant, provided traffic engineering services from concept through final design to improve traffic conditions along a stretch of Route 303, including the signalized intersection of Erie Street and Route 303 in Orangetown, Rockland County, NY. SIMCO provided the initial design services to evaluate various intersection configurations and methods to link the signalized intersection with an adjacent at-grade rail crossing to minimize backup onto the state highway.

Traffic Control Plans - SIMCO prepared long-term traffic control plans to facilitate the full-depth reconstruction of the shoulder and roadway widening. The plan was coordinated with overall project construction to ensure safe drainage throughout the project and ideal project phase progression. SIMCO provided input on ideal schemes to minimize exposed slopes as per the AASHTO Roadside Design Guide.

Striping and Sign Location Plans – SIMCO prepared striping and sign location plans in accordance with MUTCD and current NYSDOT practices.

Traffic Signal Plans – SIMCO prepared traffic signal plans to replace an existing span wire signal with a steel pole/mast arm signal to support the new intersection configuration. SIMCO designed in-roadway vehicle detection layout and conduit wiring details and the future interconnection with the adjacent rail crossing into the traffic signal. The plans were prepared in accordance with the MUTCD.

Broadway Junction is the primary transportation hub for Brooklyn's East New York neighborhood. The location is served by the MTA New York City Transit (NYCT) A, C, J, L, and Z subway lines and the B20, B25, B83, Q24, and Q56 bus routes, as well as by other nearby bus routes.

Approximately 8,500 passengers board the subway daily from this location, over 2,700 of whom transfer from one of the bus routes. Over 2,900 additional passengers transfer from one bus route to another at this location.

From Broadway Junction, the bus routes fan out in multiple directions to serve areas of the neighborhood that are not easily reached by walking. The East New York station of the Long Island Railroad (LIRR) is within the project area, approximately two blocks from Broadway Juntion. Callahan-Kelly Park is also nearby.

As part of an ESA contract with the New York City Department of Transportation, this project consisted of the rehabilitation and improvement of Broadway Junction and the surronding roadway. The goal of the project was to improve vehicular and pedestrian flows.

SIMCO’s role in the design effort was to create work zone traffic control plans and staging plans. Tasks included developing the staging and maintenance and protection plans while maintaining current pedestrian, bus, and vehicular traffic. ADA, NYCDDC, and MUTCD standards were followed to create the traffic and staging plans. Cost estimating was also performed.