City of Los Angeles LADOT CEQA Transportation Impact Assessment for Threshold T-3

The impact assessment related to potential hazards due to geometric design features, particularly those associated with access points to and from a project site, is crucial for evaluating safety, operational efficiency, and capacity impacts. These impacts can affect various aspects, including vehicle-vehicle interactions, vehicle-bicycle conflicts, vehicle-pedestrian interactions, operational delays, and capacity constraints. The assessment typically focuses on permanent conditions after the project's completion but may also consider temporary conditions during construction.

Here are key considerations and methodologies for evaluating access impacts:

1. Access Point Evaluation: The assessment should consider the design, location, and number of access points to and from the project site. All proposed access points, including driveways, should be thoroughly evaluated.

2. Conflicts Analysis: Identify potential conflicts, such as vehicle-vehicle, vehicle-bicycle, and vehicle-pedestrian interactions, that may arise due to the access configuration or location of driveways in relation to visibility, adjacent facilities, or nearby intersections.

3. Visibility and Sight Distance: Evaluate sight distance at access points to ensure that drivers have adequate visibility of approaching vehicles, cyclists, and pedestrians. Inadequate sight distance can increase the risk of collisions.

4. Queuing Analysis: Assess the potential for queuing of vehicles waiting to access or exit the project site. Consider the impact of queuing on adjacent roadways, intersections, and freeway off-ramps.

5. Operational Delays: Examine how access points may affect the operational efficiency of the surrounding transportation network. Determine whether the project would lead to operational delays, congestion, or disruptions.

6. Freeway Safety Impacts: If the project is expected to generate significant demand that could result in additional vehicle queues on freeway off-ramps, assess the potential safety impacts. Analyze differentials in travel speeds between exiting vehicles and those traveling at higher speeds on the freeway.

7. Quantitative Analysis: Use simulation models to quantitatively analyze potential impacts, such as queuing and safety hazards. These models can provide insights into the expected operational conditions.

8. Existing Conditions Assessment: Collect data on existing traffic conditions, prevailing travel speeds, and safety records to establish a baseline for impact assessment.

9. Mitigation Measures: Identify potential mitigation measures to address safety and operational concerns. These measures may include adjustments to access design, traffic signal installation, intersection improvements, or other traffic management strategies.

10. Construction Phase Analysis: Consider the impact of construction activities on access points and adjacent roadways. Implement temporary traffic control measures as needed to ensure safety during construction.

The goal of this assessment is to identify and mitigate potential hazards associated with access points and geometric design features to enhance safety, minimize operational disruptions, and maintain efficient traffic flow in and around the project site.

Please contact us if you need help preparing a transportation assessment report for a development project in the City of Los Angeles LADOT.