Portfolio

View looking Linda Avenue showing crosswalk with pedestrian safety features

Linda Avenue Bulb-outs

Linda Avenue Bulb-outs City of Piedmont, California Coastland | DCCM provided design services for the Linda Avenue Bulb-out project, which included pedestrian-actuated flashing beacons. The City’s Bicycle and Pedestrian Master Plan identified several locations as high-priority locations for installation of enhanced pedestrian crossings to provide better pedestrian safety. Two locations included crosswalks on Linda Avenue in front of Beach Elementary Schools and City tennis courts.  Improvements associated with the project included installation of bulb-outs at two locations and edge lit flashing pedestrian activated crossing signs at each of the two crossings, as well as striping improvements on Linda Avenue to include bicycle lane/routes that connected to existing bicycle lanes in the City of Oakland. The bulb-outs now provide significantly safer crossings at these locations and bicycle lane striping has promoted traffic calming due to narrower lanes.

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Aerial view of the City of Grass Valley East Main/Idaho-Maryland Roundabout

East Main/Idaho-Maryland Roundabout

East Main/Idaho-Maryland Roundabout City of Grass Valley, California Grass Valley’s East Main/Idaho-Maryland Roundabout is located at the intersection of two prominent urban roadways with one leg accessing State 20/49 Freeway. It was uniquely designed with one– and two-lane segments. The project has received a very positive response from the community. The team of W-Trans and Coastland | DCCM completed the design for this project. Coastland | DCCM provided civil design; drainage analysis and design; utility mapping and coordination; right-of-way needs identification; pavement design; and assistance to the City in obtaining regulatory permits and approvals. One leg of the intersection provides access to SR 20, so the design was coordinated with and processed through Caltrans. Coastland | DCCM also assisted the City with supplemental inspection services during construction.

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Old Redwood Highway Bicycle & Pedestrian Enhancements

Old Redwood Highway Bicycle & Pedestrian Enhancements Town of Windsor, California Coastland | DCCM designed and managed a team of subconsultants on this project which provides connectivity for pedestrian and bicycle movements through the US101 interchange with Old Redwood Hwy. Other improvements included median islands, landscaping, pavement widening, pavement repair and an overlay over the length of the project. Pedestrian improvements include two new pedestrian signal phases, approximately 400 linear feet of sidewalk, 13 ADA curb ramps, six standard crosswalks, one enhanced/raised crosswalk, and 12 countdown pedestrian signal heads.  The new crossings and raised crosswalk provide a more direct route for pedestrians and improve safety at the on-ramp by increasing visibility. New bicycle facilities include approximately 2,500 linear feet of Class II bike lanes enhanced with colored asphalt, lane detector loops, and retrofit of drainage grates.  Bike facilities on ORH closed the gap between existing facilities on each side of the US 101 interchange. Drone photo courtesy of W-Trans.

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Aerial view of the Hauser Bridge in Sonoma County

Hauser Bridge

Hauser Bridge County of Sonoma, Transportation & Public Works Coastland | DCCM supported the OPAC team on the design of the Hauser Bridge replacement project in Sonoma County. The project consists of replacing the one-lane bridge over the South Fork of the Gualala River with a two-lane, 29-foot-wide and 165-foot-long steel bridge.  The new bridge will be adjacent to the existing bridge, and will provide two lanes designed to meet current standards. Coastland | DCCM’s role included roadway and drainage design on the bridge and approaches, hydraulic engineering and utility relocations. This is one of many Sonoma County bridges currently being designed by our team.

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View of Foss Creek Trail food bridge

Foss Creek Trail

Foss Creek Trail City of Healdsburg, California Coastland | DCCM prepared feasibility studies and performed engineering design to develop a key bicycle and pedestrian pathway along the SMART corridor in downtown Healdsburg. The Foss Creek Pathway extends from the southern to northern limits and plays a significant role in growing the community and encouraging transit-oriented development in Healdsburg. The pathway meanders between trees along the railroad tracks from the south to north end of town, tying into the Railroad Depot to allow users to transfer from one mode of transportation to another. For safety and security, a six foot fence separates the railroad from the pathway and decorative lighting was installed through the length of the project. The 10-foot wide pathway is located a minimum distance of 15 feet from the railroad centerline, with more clearance where possible. The pathway elevation is established based on the future reconstruction of the SMART tracks and the desired drainage patterns. Where necessary, a v-ditch in accordance with SMART standards was designed between the rail and the pathway to provide improved drainage conditions. Coastland | DCCM’s role also included preparing hydrology and hydraulic calculations, upgrading storm drain facilities and addressing environmental concerns. The project involved extensive coordination with Sonoma Marin Area Rail Transit (SMART) and received recommendations from the North Coast Railroad Authority (NCRA) and the California Public Utilities Commission (CPUC).

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Installation of the San Rafael Grand Avenue Bridge

Grand Avenue Bridge & Pathway Connector

Grand Avenue Bridge & Pathway Connector City of San Rafael, California Coastland | DCCM provided construction management and inspection services for this important bridge project in San Rafael. The primary objective was to improve pedestrian safety on the Grand Ave. bridge over the San Rafael channel. The new steel bridge connects a high-volume pedestrian pathway in the center of San Rafael. With the completion of the bridge, pedestrian traffic is separated from vehicle traffic.  This project consisted of all associated work with the fabrication and placement of HID precast concrete piles, construction of concrete abutments, fabrication and installation of the new 136 foot span steel bridge, construction of ADA compliance at grade approaches to the bridge, modification of the existing vehicular bridge sidewalks; installation of methacrylate bridge deck treatment, concrete guardrail, sidewalks, curbs, gutters, striping, electrical fixtures, utility relocation for water line currently suspended for the existing vehicle bridge, traffic controls, hot mix asphalt, and retaining walls on Grand Avenue between Second St. and Francisco Blvd. East. 

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Street view looking across intersection at Lincoln Boulevard

Lincoln Boulevard Repaving​

Lincoln Boulevard Repaving City of Lincolnville, California The City of Lincoln has planned for a repaving project on Lincoln Boulevard from the Auburn Ravine bridge to Sterling Parkway. Coastland | DCCM provided design, plans, specifications and estimates for construction. During construction Coastland | DCCM provided engineering support to assist the City.   The project consisted of performing full-width pavement grinding, construction of structural pavement patch repairs, placement of a rubberized chip seal Stress-Absorbing Membrane Interlayer (SAMI-R), and construction of a rubberized hot mix overlay (RHMA-G) per State Standard Specifications, as well as replacement of concrete curb, gutter and sidewalk access ramps, modification of traffic signal pedestrian push buttons and posts, replacement of traffic signal detector loops and handholes, and installation of new pavement delineation and markings. Project work was performed on a City arterial roadway within City public rights of way and easements. 

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