Post Opening Project Evaluation: A1 Dishforth to Leeming One Year After Opening Study

This document describes a comprehensive evaluation of the A1 Dishforth to Leeming scheme one year after its implementation, examining its impact on various aspects including traffic, safety, economy, environment, community, and policy alignment. The scheme, which upgraded a section of the A1 in North Yorkshire to a three-lane motorway, aimed to reduce accidents, congestion, and improve journey time reliability. Methodologically, the evaluation employed traffic analysis, collision data, economic assessments, environmental impact studies, site visits, and consultations. Results showed a decrease in traffic volumes, improved journey times, and a significant reduction in collisions, but a lower than predicted benefit-cost ratio. Environmental impacts were mixed, with improved air quality and noise levels but some negative effects on landscape and biodiversity. Community impacts were minimal, with improved amenities for non-motorized users and neutral effects on flood risk and water quality. The scheme aligned with government policies and generally enhanced journeys for vehicle travelers, though further monitoring is needed to assess long-term effects. Landscaping efforts were initially moderately adverse but are expected to integrate well into the existing landscape over time. **This summary was written by an AI model and therefore should not be considered a definitive summary of the report. If you are aware of inaccuracies, please email evaluation.registry@cabinetoffice.gov.uk.**

Description

• Lead department: Highways England
• Evaluation stage: A complete evaluation report
• Other departments: No other departments listed
• Evaluation types: Value for money evaluation; Impact evaluation
• Impact methods: Generic research method
• Value for money methods: Cost-benefit analysis
• Grant information: This intervention is not distributing funding via a grant
• Government Major Project information: This intervention is not a major project
• Policies: No policies provided

Event Dates

• Event Name: Publication of final results
• Event date: July 2015

Evaluation Costs

• Cost: Not provided

Evaluation sharing

• Link(s) to published report(s): Yes
• Links to evaluation plans: No link provided
• Links to published evaluations (DEBUGGING): No final report link found.
• Findings: Not provided
• Permission to share confirmed: Yes