Driver Performance Measurement and Analysis System (DPMAS). Volume 1, Description and Operations Manual
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Summary
This document serves as the description and operations manual for the Driver Performance Measurement and Analysis System (DPMAS), a prototype instrumented vehicle developed by Systems Technology, Inc. for the National Highway Traffic Safety Administration (NHTSA). The system was designed to provide a comprehensive research tool for demonstrating contemporary instrumentation and data acquisition techniques. Its primary motivation was to facilitate varied experimental programs, including studies of driver behavior in control tasks, driver-vehicle-environment interactions, driver training and licensing proficiency, and experiments on driver impairment caused by alcohol, drugs, or other stressors. The DPMAS is installed in a modified 1974 Chevrolet Impala equipped with heavy-duty suspension and specific instrumentation. The vehicle features a completely instrumented interior capable of digitally recording driver control inputs, vehicle motion variables, lane position, and driver psychophysiological measures. Key hardware components include a Central Electronics Console housing signal conditioning, data acquisition, and servo control units. The system utilizes a three-camera video setup to record external visual scenes and interior driver actions. A critical feature is an electrohydraulic servo steering system that allows researchers to vary vehicle dynamics, adjust steering ratios, and apply external disturbances to force driver control responses. Data is captured via a digital magnetic tape recorder, with analog signals conditioned through scaling, buffering, and bandpass filtering before conversion. The system supports up to 64 analog signal channels and 32 discrete inputs, organized into selectable groups for different experimental scenarios. Sensors measure steering wheel angle and rate, throttle position, brake pressure, yaw velocity, lateral and longitudinal acceleration, and heading. Psychophysiological data, including heart rate and respiration, are collected via a belt-pack system electrically isolated from the vehicle’s power source to ensure safety. The data acquisition unit allows for variable sample rates and gain settings, with an automatic calibration mode to verify channel scaling. An experimenter’s keyboard enables the entry of coded events into the data record, such as traffic incidents or instructional cues. The significance of the DPMAS lies in its ability to integrate multiple data streams—vehicle dynamics, driver inputs, physiological responses, and visual context—into a single synchronized record. This integration allows for detailed analysis of closed-loop driver-vehicle interactions and the effects of external perturbations. The manual provides detailed operational checklists, sensor installation guides, and data processing instructions, establishing a standardized framework for conducting rigorous driving performance experiments. By documenting the hardware requirements and operational procedures, the report supports the replication and maintenance of such systems for future traffic safety research.
Key finding
The DPMAS prototype integrates a fully instrumented vehicle with digital data acquisition, video recording, and active servo steering to enable comprehensive measurement of driver-vehicle-environment interactions.
Methodology
dataset
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 |
| chunk | success | — | — | — | 1 | 2026-06-01 |
| 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 | — | — | 19 | 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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- Methodological Resource: validation psychometrics, tool software, measurement protocol