Ourston has extensive experience in micro-simulation utilizing programs such as VISSIM. Our team has produced complex micro-simulations for analysis and public presentation. Simulation is an effective way to evaluate interaction between intersection control types such as corridors of roundabouts, or roundabouts and traffic signals. It is immensely important to not only understand the capabilities of micro-simulation programs, but also their limitations. Other key benefits include assessment of weaving and merging behaviors between intersections.
Projects using VISSIM
M5 at Pontiac Trail, Commerce Township, Michigan (2007) This high-capacity roundabout simulation was used as a key component to obtain approval from state and county agencies. The roundabout has three, three-lane entries and one, four-lane entry with triple left turns. Including the two bypass lanes, the projected 2030 design hour volumes are around 10,000 vehicles.
Butler Avenue, Flagstaff, Arizona (2008) Micro-simulation was used to determine the operational impacts of right-in and right-out access for a large truck stop complex, and in particular, it’s effects on truck egress. The micro-simulation model includes analysis of the U-turning traffic from the truck stop complex at the proposed roundabout. The VISSIM model produces a qualitative depiction of the analysis of the corridor to compare operational impacts of two of the driveway egress alternatives.
Superior St. & 14th Street, Lincoln, Nebraska (2009) The City of Lincoln had asked Ourston to complete a simulation of a high-capacity roundabout. The City was hesitant to implement a roundabout with three lane entries, and requested a visual animation of how the roundabout would operate. The projected 2025 peak hour volumes are around 5,700 vehicles per hour.
Ourston has extensive experience in micro-simulation utilizing programs such as 