Traffic Engineering Design

LLG recently prepared traffic engineering design plans for City of Los Angeles review/approval to allow the implementation of streetscape improvements surrounding USC’s University Village. The enhancements included scramble crosswalks, traffic signal modifications, decorative sidewalks, street lighting enhancements, and roadway striping and signage improvements.

Linscott, Law & Greenspan, Engineers (LLG) prepared traffic design plans associated with the construction of both on-site and off-site improvement required of a retail shopping center with approximately one million square feet (SF) of gross leasable area (GLA). Our team prepared Signing & Striping Plans, Traffic Signal Installation and Modification Plans and Traffic Control Plans for improvements along Barranca Parkway, Tustin Ranch Road, Park Avenue and Warner Avenue in an effort to provide for the safe and orderly movement of pedestrian and vehicular traffic during and after the implementation of roadway improvements.

Using a comprehensive database of existing traffic conditions for the border station, LLG directed regional modeling efforts to inform future border crossing projects. LLG actively participated in design charrettes to develop master plan options for the border station – all of which involved relocating southbound traffic to the El Chaparral area entrance to Mexico. LLG proposed and developed tandem booths for the entry to the US, and assisted in the review and evaluation of the geometric layouts for auto, SENTRI lanes and bus access.

LLG prepared a comprehensive traffic impact analysis and parking study reports investigating the impacts and circulation needs for this 369,000 square foot urban recreational and entertainment harbor in downtown Long Beach. LLG also delivered traffic design plans for required off-site improvements located along Shoreline Drive, Pine Avenue, Seaside Way and Chestnut Place intended to accommodate access to the harbor.

Cooperating with Caltrans, LLG conducted a comprehensive analysis of the Friar’s Road interchange for the City of San Diego. The analysis included existing conditions, future conditions and the development and analysis of project alternatives. LLG delivered an analysis of existing freeway merge/weave occurrences and developed strategies to eliminate or simplify current freeway merge/weave patterns.

LLG prepared six traffic signal modification plans and corresponding engineer’s estimates of probable construction costs for various intersections along Verdugo Road in the City of Glendale. LLG adhered to the City’s expedited timeline and schedule constraints calling for a 60 percent plan to be submitted in February and the 100 percent Mylar plans by May, after receiving initial authorization to proceed in late January.

LLG worked with the Exposition Metro Line Construction Authority to help design 8.6 miles of Light Rail Transit extending from Downtown Los Angeles to Culver City. LLG provided technical advisory, plan reviews and technical quality assurance support to the Expo Construction Authority. LLG’s senior staff served as both lead traffic engineer and project manager, applying extensive technical knowledge and experience with traffic signal systems. LLG reviewed the project traffic signal, photo enforcement, signal interconnect, signing/striping and overhead sign plans for various segments of the project. LLG also maintained quality assurance and provided the required agency support with the Los Angeles Department of Transportation (LADOT) to allow for the plan reviews and approvals to proceed efficiently and effectively.

LLG was responsible for the modifications of 29 traffic signals along the Alameda Corridor from Long Beach to Los Angeles through Vernon, Huntington Park, South Gate, Lynwood, Compton and the County of Los Angeles. LLG developed multiple stages of temporary traffic signal plans and detour plans for construction, and maintained close coordination with local agencies, design teams and contractors to ensure each plan’s accuracy and to meet established construction schedules. LLG also designed traffic signals covering two adjacent intersections separated by a bridge structure with multiple agency reviews required, including the Public Utilities Commission (PUC). LLG was able to provide consultation on time and within approved budgets for this unique and challenging project.