Review, Experimental Evaluation and Policy Considerations of a Directional Time of Day Truck Restriction on Highways

Bassan, Shy · 2015 · Crossref

DOI: 10.5399/osu/jtrf.54.1.4276

archive: archived pipeline: cataloged verified

Get this paper ↗ (DOI — opens at the source; we link to it, we don't host it)

Summary

This study evaluates the effectiveness of a directional, time-of-day truck restriction policy on Highway 1 in Israel, aiming to improve traffic efficiency during peak hours. While previous research focused on restricting trucks from leftmost lanes, this approach often increased queue lengths at merging areas. Consequently, the author investigates a more comprehensive strategy: prohibiting heavy trucks (over 12 tons) from all lanes in the westbound direction during the afternoon peak period (16:00–18:00). The motivation stems from the operational disparities between heavy vehicles and passenger cars, particularly on steep grades where trucks slow significantly, causing congestion and safety hazards. The study seeks to quantify benefits in terms of average travel time, total travel time, and average speed. The experimental design involved a before-and-after analysis on a 34-kilometer segment of Highway 1 connecting Jerusalem and Tel Aviv. Data were collected on December 28, 2010, prior to the restriction, and March 1, 2011, two months after implementation, to allow for driver adaptation. Traffic volumes and travel times were measured using real-time video photography and automatic counters across eight subsections defined by interchange locations. Vehicle types were categorized as light, medium, and heavy. Statistical significance was assessed using two-sample t-tests with unequal variances (Welch–Satterthwaite approximation) at a 95% confidence level. The results demonstrate that the truck prohibition significantly improved all three traffic flow parameters by 8% to 12%. Specifically, average travel times and total travel times decreased, while average speeds increased. The improvements were most pronounced on road segments with steep longitudinal grades, confirming that grade severity correlates with traffic flow enhancement when trucks are removed. Traffic volume analysis revealed a 9.1% decrease in medium and heavy vehicles and a slight 2.35% increase in light vehicles, resulting in a net 1.54% increase in total vehicle count. Statistical tests confirmed that the differences in travel times before and after the restriction were significant for all vehicle types across the analyzed time periods. The study concludes that prohibiting trucks from all lanes in one direction during peak hours is a more effective strategy for improving traffic efficiency than restricting only specific lanes, particularly on highways with significant elevation changes. This approach mitigates the negative impacts of slow-moving trucks on general traffic flow without requiring physical infrastructure changes like climbing lanes. However, the author notes potential economic implications for trucking companies, as restrictions may alter routes and scheduling, potentially affecting profitability. The findings suggest that directional time-of-day restrictions offer a viable policy tool for managing congestion and enhancing safety on mixed-traffic highways.

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed.

Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.

Topics

Ranked by relevance to this paper. Hover a topic for its definition.

• traffic density