Commercial Driver Rest & Parking Requirements: Making Space for Safety

NHTSA · 1998 · ROSA P / United States. Federal Highway Administration

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Summary

This 1998 Federal Highway Administration (FHWA) study addresses the critical safety issue of commercial driver fatigue by evaluating the adequacy of truck parking facilities across the United States. Motivated by the steady growth in trucking and the resulting demand for safe rest areas, the research aimed to determine the supply, utilization, and demand for parking at both public rest areas and privately-owned truck stops. The study sought to understand whether these facilities serve as substitutes or complements and to identify strategies for alleviating parking shortages that contribute to unsafe driving conditions. The methodology involved a comprehensive nationwide inventory of 1,487 public rest areas in the 48 contiguous states, alongside direct observation of parking usage along a 200-mile segment of Interstate 81. Researchers also conducted surveys and interviews with 500 truck drivers, 330 motor carriers, and 170 truck stop operators, as well as a weighted survey of 381 private truck stop operators. Two analytical models were developed: a Capacity Utilization Model to estimate the impact of variables like traffic volume and facility amenities on public rest area usage, and a Truck Parking Demand Model, modified from a 1979 Minnesota Department of Transportation framework, to project nationwide demand. Findings revealed significant distinctions between the two facility types. Public rest areas were frequently overcrowded, with 80% full or overflowing at night, and often lacked legal parking spaces between midnight and 5 a.m., leading drivers to park on shoulders. In contrast, while many private truck stops reported being full at night, the study projected an overall surplus of parking capacity in the private sector, with 167,000 trucks parked nightly against a capacity of 185,000 spaces. Drivers preferred public rest areas for short-term stops due to accessibility, but favored private truck stops for overnight parking due to superior services, safety, and security. The analysis concluded that public and private facilities are complementary rather than direct substitutes, meaning the surplus in private parking does not resolve the shortage in public rest areas. The study recommends that the most cost-effective solution to increase public parking capacity is the renovation of existing facilities and the construction of new ones, particularly utilizing efficient diagonal, pull-through designs. It also suggests that state and local officials integrate truck parking requirements into public policy and spending practices. The findings underscore that the nationwide shortfall in adequate truck parking remains a significant safety problem requiring coordinated solutions from both public and private sectors, prompting further congressional-mandated research into parking shortages along the National Highway System.

Key finding

Public rest areas and privately-owned truck stops serve complementary rather than substitutable functions, with rest areas primarily used for short-term stops and truck stops for long-term parking, despite rest areas experiencing significant capacity shortages at night.

Methodology

mixed_methods

Sample size: 2487

Provenance

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Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• truck driver fatigue