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Health Serv Res. 1978 Winter; 13(4): 404–417.
PMCID: PMC1072082

Predicting the response time of an urban ambulance system.


Response time, i.e., the time from dispatch of an ambulance to its arrival at the scene of an emergency, is an important measure of performance in an urban ambulance system. We developed a model that predicts the entire distribution of response time, explicitly accounting for the rate and spatial distribution of demand, variable ambulance velocities, and queueing effects. We tested the model using data sampled from 3,936 ambulance runs in Houston and achieved close agreement between empirical and predicted distributions of response time. Our use of probability theory to predict response times yielded a model that complements those previously reported for planning and evaluating urban ambulance systems.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Gibson G. Evaluative criteria for emergency ambulance systems. Soc Sci Med. 1973 Jun;7(6):425–454. [PubMed]
  • ReVelle C, Bigman D, Schilling D, Cohon J, Church R. Facility location: a review of context-free and EMS models. Health Serv Res. 1977 Summer;12(2):129–146. [PMC free article] [PubMed]

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