Studies of speeds and delays on rural roads in Australia.

This paper discusses the development in three stages of a model for traffic operation on rural roads. The three stage are: 1. The empirical study of the relationship between free speeds and geometric features, roadside development, weather, etc. 2. The development of appropriate queuing models to relate actual speeds to free speeds. 3. The empirical study of the queuing model parameters (e.g. following headway's and gap acceptance in overtaking. Each stage is discussed with particular reference to Australian conditions, and available data is presented wherever possible.