Transportation Safety
LLG emphasizes safety in our planning and engineering solutions for the traveling public. We provide transportation safety consulting services that involve the assessment of access and circulation through a holistic approach to provide safe, equitable, and efficient mobility solutions. Our holistic approach entails a firm understanding of the different user groups such as pedestrians of all ages and abilities, micromobility (e.g., bicyclists, scooterists, skateboarders, etc.), and vehicles. This lays the groundwork to ensure that our assessments have all potential users in mind. We then leverage the data available and apply the Safe System approach to provide recommendations that enhance roadway safety. Several members of the LLG team are certified Road Safety Professionals and/or certified Traffic/Civil engineers with experience in safety projects from grant writing to construction management to on-going operations/maintenance, which helps address any potential project issues from planning to engineering/design, to implementation and beyond.
Transportation Safety:
- Local Roadway Safety Plan (LRSPs)
- Road Review/Audits
- Safe Routes to School
- Active Transportation Safety
- Pedestrian/Bicycle Mobility Safety
- Comprehensive Complete Streets Assessment
- Grant Writing
- Advisory Curve Speed Assessments
- Speed Limit (E&TS)
- Pedestrian Master Plans
- Bike Master Plans
The County of San Diego Local Roadway Safety Plan (LRSP) involved conducting a holistic, systemic safety assessment for the County as a whole and focused assessments for each of the 23 unincorporated planning communities within the County. LLG processed over 17,000 collision data points in mostly rural areas within the County using Geographic Information System and Excel. Our data-driven approach extended beyond collision frequency, severity, and rates by incorporating health and social justice as a critical determining factor in recommendations’ prioritization. This approach enabled a holistic and equitable approach to roadway safety.
The City of Pasadena Safe Routes to School project involved preparing the safe route to school maps for 17 elementary, middle, and high schools throughout the City. LLG led the project efforts by conducting a field survey around each school to gather valuable information such as existing traffic control devices, crosswalk location and type, pedestrian ramps, school crossings, missing sidewalks, and other pertinent roadway features. The team analyzed and assessed the information to determine safe routes within the school’s service area. The routes were determined based on sidewalks, marked crosswalks, ADA compliant pedestrian ramps, crossing guard locations, and several others.
The Road Safety Review Project involved evaluating and providing recommendations for three local roadways within San Diego County, totaling 22 miles. The safety assessment consisted of comprehensive documentation and assessment of the existing conditions, including the road signs, pavement, guard rails, and collision data. Additionally, a ball bank assessment was conducted for all horizontal curves. Based on the existing conditions and collision trends, countermeasures were identified. A model/ tool was developed to calculate the recommendations’ potential effects on reducing the collisions by utilizing published crash modification factors (CMF).
This project involved conducting a road safety review for a 3.1 mile stretch of Valley Center Road for the Rincon Band of Luiseño Indians. This roadway is a San Diego County maintained road that traverses through tribal lands. The assessment included conducting field reconnaissance and obtaining traffic data (i.e. counts and speeds surveys) to understand the existing conditions pertaining to roadway safety (e.g., capacity, sight distance, signing/striping, hazards, etc.), reviewing the collision data, identifying collision trends, and evaluating the traffic capacity.
Based on a review on the existing conditions, LLG developed a list of recommendations to enhance the roadway safety. Recommendations included providing rumble strips, conducting a utility pole location assessment, providing guardrails at roadside hazards, providing shoulders, and other safety related recommendations. A conceptual plan was prepared to illustrate and call out the recommendations along the study segment.
San Diego Gas & Electric Company (SDG&E) had retained the services of Linscott, Law & Greenspan, Engineers (LLG) to assess existing utility pole placements throughout the County of San Diego. The County had provided SDG&E with a list of approximately 125 utility poles that have recorded conflicts with vehicles between 2003-2008. The objective of this project was to conduct an independent assessment on the clear zone requirements of each pole and provide recommendations whether existing poles need to be removed, relocated or protected in place.
LLG conducted field reconnaissance at each pole to measure the existing clear zone and other roadway conditions. This clear zone was compared to the industry standard based on the AASHTO Roadside Design Guide, which specifies clear zone requirements based on roadway slope, speed and ADT. LLG also analyzed the type of accident (fatality vs. injury) and provided recommendations as to remove, relocate or protect a pole. A pole score was developed to help prioritize improvements.
