TETRA TECH (3) - Laserfiche WebLink

Home Browse Search

On -Call Engineering Services DOWNTOWN LOS ANGELES (DTLA) ARTS DISTRICT PEDESTRIAN & CYCLIST SAFETY ACTIVE TRANSPORTATION PROJECT (ATP) 3, Los Angeles, CA Tetra Tech provided survey and civil engineering design services for the DTLA Arts District Pedestrian and Cyclist Safety Active Transportation Project (ATP) 3. The project area was characterized by a complex street system of very long blocks with few safe crossing locations, complicated intersections, and very limited bike facilities that create mobility challenges for residents, workers and visitors to the district. Many of the streets lack sidewalks, or have very narrow sidewalks, since most streets were built to handle large freight trucks making deliveries and pick-ups at area factories and warehouses where long loading docks and wide driveways take the place of sidewalks for pedestrians. The project design provides pedestrian and cyclist improvements including new cycle tracks, bike lanes, bike routes, new and widened sidewalks with curb extensions, new traffic -controlled intersections, a new shared street connecting to the new Sixth Street Viaduct Arts Plaza, as well as green street elements. In order to accommodate the project's short design timeline, Tetra Tech surveyors deployed immediately and performed an LIAWLIAS survey of the entire project area. This allowed a preliminary base file drawing to be created to facilitate the pre -design report phase. As the design of the project evolved Tetra Tech's surveyors and designers worked on a plan to only survey the necessary areas of the project, and only to the detail needed. Many portions of the project needed only striping improvements for which the aerial acquired data was sufficient. Others required striping and lighting. For those surveyors used GPS to locate and ID surface evidence of utilities. For areas of ADA access and critical drainage, survey crews utilize robotic total station and terrestrial LiDAR to capture design accurate grades. Data from the various forms of acquisition was combined into a seamless looking base file drawing to support the final engineering design. SKID ROW NEIGHBORHOOD TOPOGRAPHIC SURVEYS AND CONSTRUCTION STAKING, Los Angeles, CA Tetra Tech provided surveying and construction staking services for mobility improvements in the Skid Row Neighborhood, Los Angeles. Tetra Tech surveyed 13 intersections in coordination with the Bureaus of Engineering and Sanitation, as well as the Los Angeles Police Department and subcontractors. Survey logistics were complex while as many as three Tetra Tech crews followed Bureau of Sanitation personnel and police officers as they facilitated the temporary closure of locations used by homeless residents. Crews focused on conducting accurate and complete surveys with special attention to crew and public safety and sensitivity to homeless residents in the vicinity. Deliverables were created to meet the City's standards and guidelines and for direct use and import by the City's design staff. 0 TETRA TECH