CAHILL, RONALD MARTIN.

This is a study of intraurban rail rapid transit
systems in relation to possible implications for an urban
area over a period of 250 years. Two digital computer
simulation models using the DYNAMO computer language are
integrated to explore the results of assumed relationships
between intraurban rail rapid transit usage and an urban
area under highly pure conditions that are also assumed.
One computer simulation model is developed for use as a
rail rapid transit sector with Forrester's urban model and
is then integrated with the urban model as a sector.
The conclusions reached in the study are related
to the simulation results and state that an intraurban rail
rapid transit system may serve as a catalyst for an urban
area's revival under conditions where it is used in place
of automobiles to a high degree. However, it is also concluded
that the rail transit usage may need to be accompanied
by other specific policies in order to produce any tangible
long run changes in the urban area equilibrium conditions.