The Third Transportation Student Research Symposium
Abstract Detail
| Name | School | Title of presentation |
| Rahul-Deshpande | UMass Lowell | Characterization of Urban Street Performance in Relation to Quality of Progression |
|
In this study we develop a TRANSYT-like model to evaluate the performance of linked arterial segments
as a function of traffic flow patterns, geometric characteristics and signal settings. We use cyclic
flow profiles to predict queuing behavior and calculate both deterministic and stochastic component of
delay. Our results are compared with common models in the literature e.g. HCM, Robertson, Akcelic and
microscopic simulation model TSIS 5.0. Both under-saturated and over-saturated conditions are being
analyzed.
The current HCM methodology uses average travel speed for measuring the performance of an arterial. The average travel speed is computed from the running times on urban streets and the control delay of through movements at signalized intersection. The effect of progression is taken into account by using a Progression Factor (PF) which is used for calculating control delay. The Progression Factor is only an estimated value based on field observations and general information about the site. The objective of this study is to develop a refined procedure for the progression factor calculation in HCM chapter 15. |
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