EVALUATING ADAPTIVE CRUISE CONTROL DESIGNS IN LIGHT OF THE STOCHASTIC NATURE OF ENCROACHMENT CONFLICTS

A computerized design tool is described for estimating the occurrence and severity of stereotypical motion conflicts that may occur with a given Adaptive Cruise Control (ACC) system design and vehicle platform. The tool represents the ACC system and the vehicle's response characteristics in a mechanistic manner while the conflict variables are considered per their probability distributions as seen in empirical data. The structure of the tool is presented, including conflict scenarios, embedded empirical databases, conflict measures, and the processing of results to express conflict occurrence as cumulative distribution functions (CDF). Implementation of the tool is presented covering two out of a total of six conflict scenarios. One scenario addresses the overshoot in target headway that may accrue when approaching a slower moving vehicle from long range. The second scenario addresses the accrual of shorter-than-intended headways when the lead vehicle brakes. In an individual scenario, the prevailing vehicle speeds, longitudinal grade, road curvature, and deceleration levels are varied, as appropriate, in accordance with the probability distributions seen in actual highway service. Computed results are shown and discussed in light of the design decisions that face auto manufacturers concerned with introducing ACC products.

• Supplemental Notes:
  • Full conference proceedings available only on CD.
• Corporate Authors:

  ITS America

  1100 17th Street, NW, 12th Floor
  Washington, DC  United States  20036
• Authors:
  • Ervin, R D
  • Stein, J L
  • Bogard, S E
  • Zachariou, N
  • Kleinsorge, K
• Conference:
  • Intelligent Transportation: Realizing the Future. Abstracts of the Third World Congress on Intelligent Transport Systems
  • Location: Orlando, Florida
  • Date: 1996-10-14 to 1996-10-18
• Publication Date: 1996

Language

• English

Media Info

• Pagination: n.p.

Subject/Index Terms

• TRT Terms: Adaptive control; Alternatives analysis; Automobiles; Computer aided design; Cruise control; Forecasting; Headways; Psychological conflict; Right of way (Land)
• Old TRIS Terms: Encroachments
• Subject Areas: Highways; Vehicles and Equipment; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00741514
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 4 1997 12:00AM