Integrated Corridor Management Initiative: Overview of the Dallas Traveler Response Panel Survey
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Summary
This report evaluates the impacts of the Integrated Corridor Management (ICM) Initiative on traveler behavior and satisfaction within the US-75 corridor in Dallas, Texas. Launched by the U.S. Department of Transportation to reduce congestion through coordinated operations across freeway, arterial, and transit networks, the ICM Initiative aims to improve travel time reliability and provide better real-time information to travelers. This study, part of a national evaluation of ICM Pioneer Sites, specifically measures changes in travelers’ awareness and use of information sources, their behavioral responses to corridor conditions, and their overall satisfaction with trip experiences. The research employed a panel survey methodology administered by the Volpe National Transportation Systems Center between June 2012 and January 2015. The study targeted US-75 drivers and corridor transit riders. Drivers were recruited via license plate capture and mail, completing a baseline survey before ICM deployment, an endline survey after deployment, and short “pulse” surveys immediately following specific corridor incidents. Transit riders were sampled in person at stations and surveyed only in the post-ICM period, including baseline and pulse components. Incentives such as gift cards and raffles were used to boost participation. The final sample included 1,421 drivers (3% response rate) and 603 transit riders (22% response rate). Key findings indicate a significant increase in the use of smartphones and tablets for acquiring real-time traffic information, with smartphone use rising from 79% to 87% among drivers. While awareness of various information sources (websites, apps, alerts) increased, actual usage remained relatively stable, except for a notable growth in the use of Google Maps. Regarding travel behavior, baseline and endline surveys showed no significant changes in mode choice or route selection in response to information. However, pulse surveys revealed an increase in minor route changes during afternoon peak trips when incidents occurred. Drivers reported higher satisfaction with the predictability of trip times and the accuracy of incident location and usual route delay information. Transit riders primarily relied on smartphones and DART apps, reporting high overall satisfaction with service, though seat availability during afternoon peaks remained a concern. The study concludes that while ICM deployment successfully increased traveler awareness and the adoption of mobile technologies for information access, it did not fundamentally alter general travel behaviors such as mode choice or major route deviations. The increased reliance on smartphones and specific apps like Google Maps suggests a shift in how travelers consume information, even if the frequency of checking sources remained constant. The findings imply that while ICM improves information accessibility and satisfaction with trip predictability, further strategies may be needed to influence broader behavioral changes. The data supports the national evaluation’s goal of sharing lessons learned to inform the development of future integrated corridor management systems.
Key finding
Drivers significantly increased their use of smartphones for real-time traffic information and reported higher satisfaction with trip predictability, while pulse surveys showed increased minor route changes during afternoon peak incidents.
Methodology
mixed_methods
Sample size: 2024
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. Discovered via bulk_ingest_rosap on 2026-05-23 (6 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | rosap | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | success | cached | — | — | 2 | 2026-06-10 |
| clean | success | — | — | — | 1 | 2026-06-01 |
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| embed | success | — | — | — | 1 | 2026-06-02 |
| enrich | success | — | — | — | 1 | 2026-05-23 |
| promote | success | — | — | — | 1 | 2026-05-23 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 3 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 24 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Empirical Findings: observational prevalence, self report data