Title

Estimation Of Greenshields Model Parameters Using Python

Author(s)

Aspen Golden

School Name

South Carolina Governor's School for Science and Mathematics

Grade Level

12th Grade

Presentation Topic

Engineering

Presentation Type

Mentored

Mentor

Mentor: Nathan Huynh, Department of Civil and Environmental Engineering, University of South Carolina

Abstract

Greenshields model is a two-regime equation to describe the flow of traffic before and after the break point density (the point when cars are no longer able to move at the free flow speed). This research developed Python code to estimate the four parameters of the model (Vo, the minimum speed; Vi, the free flow speed; Kb, the break point density; and α, the shape term) to be used in computer simulations of traffic. The estimated values obtained were Vo = 59.76, Vi, = 3.000, Kb = 17.21, and α = 10.49, and they show similarity to the round data.

Start Date

4-11-2015 11:00 AM

End Date

4-11-2015 11:15 AM

COinS
 
Apr 11th, 11:00 AM Apr 11th, 11:15 AM

Estimation Of Greenshields Model Parameters Using Python

Greenshields model is a two-regime equation to describe the flow of traffic before and after the break point density (the point when cars are no longer able to move at the free flow speed). This research developed Python code to estimate the four parameters of the model (Vo, the minimum speed; Vi, the free flow speed; Kb, the break point density; and α, the shape term) to be used in computer simulations of traffic. The estimated values obtained were Vo = 59.76, Vi, = 3.000, Kb = 17.21, and α = 10.49, and they show similarity to the round data.