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On -Call Engineering Services <br />DOWNTOWN LOS ANGELES (DTLA) ARTS DISTRICT PEDESTRIAN & CYCLIST SAFETY <br />ACTIVE TRANSPORTATION PROJECT (ATP) 3, Los Angeles, CA <br />Tetra Tech provided survey and civil engineering design <br />services for the DTLAArts District Pedestrian and Cyclist <br />Safety Active Transportation Project (ATP) 3. The project <br />area was characterized by a complex street system of very <br />long blocks with few safe crossing locations, complicated <br />intersections, and very limited bike facilities that create <br />mobility challenges for residents, workers and visitors to <br />the district. Many of the streets lack sidewalks, or have very <br />narrow sidewalks, since most streets were built to handle <br />large freight trucks making deliveries and pick-ups at area <br />factories and warehouses where long loading docks and <br />wide driveways take the place of sidewalks for pedestrians. <br />The project design provides pedestrian and cyclist <br />improvements including new cycle tracks, bike lanes, bike routes, new and widened sidewalks with curb <br />extensions, new traffic -controlled intersections, a new shared street connecting to the new Sixth Street Viaduct Arts <br />Plaza, as well as green street elements. <br />In order to accommodate the project's short design timeline, Tetra Tech surveyors deployed immediately and <br />performed an UAV/UAS survey of the entire project area. This allowed a preliminary base file drawing to be created <br />to facilitate the pre -design report phase. As the design of the project evolved Tetra Tech's surveyors and designers <br />worked on a plan to only survey the necessary areas of the project, and only to the detail needed. Many portions <br />of the project needed only striping improvements for which the aerial acquired data was sufficient. Others required <br />striping and lighting. For those surveyors used GPS to locate and ID surface evidence of utilities. For areas of <br />ADA access and critical drainage, survey crews utilize robotic total station and terrestrial LiDAR to capture design <br />accurate grades. Data from the various forms of acquisition was combined into a seamless looking base file <br />drawing to support the final engineering design. <br />SKID ROW NEIGHBORHOOD TOPOGRAPHIC SURVEYS AND CONSTRUCTION STAKING, <br />Los Angeles, CA <br />Tetra Tech provided surveying and construction staking <br />services for mobility improvements in the Skid Row <br />Neighborhood, Los Angeles. Tetra Tech surveyed <br />13 intersections in coordination with the Bureaus of <br />Engineering and Sanitation, as well as the Los Angeles <br />Police Department and subcontractors. Survey logistics <br />were complex while as many as three Tetra Tech crews <br />followed Bureau of Sanitation personnel and police <br />officers as they facilitated the temporary closure of <br />locations used by homeless residents. Crews focused <br />on conducting accurate and complete surveys with <br />special attention to crew and public safety and sensitivity <br />to homeless residents in the vicinity. Deliverables were created to meet the City's standards and guidelines <br />and for direct use and import by the City's design staff. <br />M <br />TETRA TECH <br />