RESEARCH POSTER PRESENTATION DESIGN © 2015

www.PosterPresentations.com RESEARCH POSTER PRESENTATION DESIGN © 2015

www.PosterPresentations.com

VISSIM and VISWALK are microscopic simulation tools developed by PTV.

VISSIM is a multi-modal traffic flow simulation software package. It models driving behaviors including: car-following, lane-changing and lateral behavior within a lane.

It can be used to analyze the operations of any transportation mode and their combinations including cars, trucks, public buses, shuttle buses, trains, taxis, bikes and pedestrians. VISWALK simulates and models walking behaviors. By combining VISSIM and VISWALK the interactions between the roadway traffic and pedestrians can be modeled realistically.

VISSIM/VISWALK can be applied in complex traffic operational analysis, including highway design, highway interchange design, arterial and intersection design, urban streets design and traffic analysis, downtown with high volume of pedestrians, and traffic congestion managements.

Various project applications with VISSIM/VISWALK are presented in the paper. Model development, model calibration and scenario application are included. Data used as inputs and data used as calibration targets are discussed. Model calibration and the problems associated with model calibration are a specific interest in the application of the program.

APPLICATION 1: Cumberland Metra Station (City of Des Plaines, IL)

System performance were compared Interchange delays were compared

• VISWALK models pedestrians in a more realistic way than VISSIM. For example, VISSIM models pedestrians like a vehicle that only move along their lane; while in VISWALK pedestrians walk across street within the entire width of the crossing.

• VISSIM/VISWALK combination provides a good tool in studying a area like downtown that has close interactions between pedestrians, non-motor vehicles and motor vehicles.

• VISSIM can be applied to various types of projects: urban planning, transportation planning, traffic engineering, interchange design and traffic analysis, corridor study, traffic impact study, etc.

• The 3D animation provides visual evaluation of the alternatives.

Transit-oriented redevelopment plan for the Cumberland Metra Station area New roundabout design VISSIM model was used to evaluate the traffic operational

performance of the study area

Xin Tian, PhD . Modeling Application in Traffic Operation Analysis

VISSIM/VISWALK

Input data Cars and trucks –

Synchro model CTA buses – CTA

boarding and alighting counts, schedules Private shuttle buses

counts – at Chicago Union Station and Ogilvie Transportation Center

Alternative Canal and Clinton reverse scenario Advantages: Buses in and out of the new transit center with

right turns; Safety - CUS pedestrians don’t have to cross streets

Challenges: Geometric constrains at Washington/Clinton

Visual Multi-modal New transit center BRT Pedestrian and CTA bus interaction

Model Calibration Based On Travel Time

Scenario NB-CTA bus SB-CTA bus

Observed (min.)

Model (min.) Difference

Observed (min.)

Model (min.) Difference

Baseline_AM 7.5 5.7 -1.8 5 6.0 1.0 Baseline_PM 5.6 5.4 -0.4 5.8 5.5 -0.3

Note: "NB-CTA bus" is measured for CTA buses on NB Canal from south of Jackson to EB Washington east of Canal "SB-CTA bus" is measured for CTA buses on WB Randolph/Wacker to SB Clinton south of Jackson

• VISSIM modeling areas: three sub-areas were modeled with VISSIM (complicated system interchanges, congested segments)

• Freeway interchange alternative designs were tested

1. Elgin-O’Hare Expressway and I-290 interchange

Included Elgin-O’Hare Expressway from east of Arlington Heights Rd to west of Meacham Rd, IL290 from Biesterfield Rd to US 20

The challenge includes: closely located on-ramps, weaving and high peak hour volumes from the Hamilton Lake are

Some designs failed VISSIM operational test

LOS for each segments were calculated from detailed output from VISSIM models since the standard HCM cannot be applied to such complicated area

2. IL19/Taft/I-294 area A complicated area with different design ideas and different design

years tested

Network Performance

Parameter 2040 PM 2040 AM

Average delay time per vehicle [s], All Vehicle Types 41 19

Average number of stops per vehicles, All Vehicle Types 0.7 0.3

Average speed [mph], All Vehicle Types 48 54

Average stopped delay per vehicle [s], All Vehicle Types 7.7 6.3

Number of Stops, All Vehicle Types 27295 10871

APPLICATION 5: Diverging Diamond Interchange at I-90 and Elmhurst (IDOT)

Located at I-90 and Elmhurst Road Alternatives: DDI vs. Parclo B Single Both alternative were modeled in VISSIM

Intersection Delay (Vehicles/second) Parclo B DDI

North 24.4 16.2

South 11.7 15.1

System Performance Comparison (I-90 Interchange + Oakton)

Parameter Parclo B Single Divergent Diamond

Average delay time per vehicle [s], All Vehicle Types 47 43

Average number of stops per vehicles, All Vehicle Types 1 1

Average speed [mph], All Vehicle Types 20.3 19.4

Average stopped delay per vehicle [s], All Vehicle Types 30 27

Number of Stops, All Vehicle Types 9298 9390

Located at E 116th Street and Hazel Dell Parkway, Carmel, IN A metered 2-lane roundabout Westbound approach is signal controlled to provide more gaps for

the heavy volume southbound traffic The signal is designed to be turned on when southbound queue

reaches certain distance; and turned off when southbound queue does not reach the threshold Customized signal control was modeled using VISSIM Vehicle Actuated Programming (VAP) Model was calibrated with RODEL model results as target

New community development Redesign of the intersection of Old US 20 and Corwin St

APPLICATION 2: Old US 20 and Corwin Corridor Study

(Elkhart County Redevelopment Commission)

APPLICATION 6: Roundabout (City of Carmel, IN)

WHAT WE LEARNED

APPLICATION 4: Elgin-O’Hare Extension / O’Hare West By-Pass (IDOT)

APPLICATION 3: Chicago Union Station Master Plan (City of Chicago)

Taxi at Chicago Union Station Pedestrians – Legion model results, Madison access counts,

pedestrian crossing counts at intersections Signal timing plans – Synchro model Baseline model calibration Driving behaviors Priority rules Pedestrian interaction with buses

Reasonable checking Reality checking Travel time (data collected via CTA Bus Tracker)