www.ptvamerica.com
Downtown Vancouver Transportation and Emergency Management System (DVTEMS)
PTV Vision User‘s Group Meeting
Karen GieseKaren Giese
Kean LewKean Lew
2
Outline
• Project Background
• Custom Interactions
• Model Demonstration
3
Project Background
4
What is DVTEMS?
Planning level travel demand model
Focus on pedestrian route choice
Based on the VISUM platform
Custom pedestrian & pedestrian-vehicle interactions
Communication through visual platform
Quantitative analysis
5
Dynamic Assignment
DVTEMS Uses Dynamic Assignment (DUE)
Key Benefits
• Accounts for Capacity Constraints
• Models Proper Interaction of Real Flows
• Models Impacts of Short-Term Measures
• Accounts for Special Event Temporal Characteristics
6
Custom Interactions
Two-way Pedestrian Capacity
> Allows Pedestrians to Utilize Both Sidewalks Along Street
Vehicle-Pedestrian Interaction at Intersections
> Uses Actual Crosswalk Flows from Assignment
Pedestrian Inundation
> Pedestrians Encroach on Vehicle Space
> Vehicle Capacity Decreased
> User-defined Parameters
7
Two-Way Sidewalk Capacity
Capacity 2
Capacity 1
8
Two-Way Sidewalk Capacity
Capacity South Sidewalk
Capacity North Sidewalk
9
Two-Way Sidewalk Capacity
Capacity 2 = Capacity North Sidewalk + Capacity South Sidewalk
Capacity 1 = Capacity North Sidewalk + Capacity South Sidewalk
Iteration 1
10
Two-Way Sidewalk Capacity
Capacity 2 = Volume Eastbound / Volume Both Dir * Two Way Capacity
Capacity 1 = Volume Westbound / Volume Both Dir * Two Way Capacity
Iteration 2 onwards Until Converges
11
Vehicle-Pedestrian Interaction at Intersections
ped volume
Car Turn Capacity = f (ped volume)
12
Pedestrian Inundation
Pedestrian Encroachment on Vehicle Lane(s)
• Parameters to be User-Defined (On or Off):> Inundation Allowed (Global Setting)
> Pedestrian Link Inverse Density Threshold for Inundation (Global Setting)
> On-Street Parking Allowed (Link Setting)
> Pedestrian Allowed On Road (Link Setting)
13
Pedestrian Inundation
Link Density > Inundation Threshold
Link Density < Inundation Threshold
Link Inverse Density > Inundation Threshold
14
Pedestrian Inundation
Link Inverse Density > Inundation Threshold
Capacity Required by Inundation
15
Pedestrian Inundation
Link Inverse Density > Inundation Threshold
ped volume
16
Pedestrian Inundation
Link Inverse Density > Inundation Threshold
Car Capacity = f (inundation capacity required)
17
Output
• Volume by Time Interval and Mode
• Pedestrian Density by Time Interval
• Pedestrian Level of Service by Time Interval
• Inundation Occurrence (Link Density > threshold and parameters allow for inundation)
• Travel Times To/From Stadium by Mode
18
Example Scenario Results: Volumes, Density, LOS Over Time
Event 1 Start: 19:00
Pre-Event 2 Start: 18:50
Event 2 Start: 21:00
18:4518:45
19
Example Scenario Results: Volumes, Density, LOS Over Time
Event 1 End: 21:30
Event 2 End: 23:00
23:3023:30
20
Example Scenario Results: Link Closure
19:1519:15
21
www.ptvamerica.com
Questions and DiscussionThank you for your attention.
