Transcript Modelling Vietnam`s Expressway Network
MODELLING VIETNAM’S EXPRESSWAY NETWORK
Presented by: Ms. Le Thi Lan Bizdev.asia
Summary
• Presentation by consultant • Recently worked on an ADB assignment supporting the Vietnam Expressway Management Office • Good progress with a GIS • Next step is traffic modelling • Joined this seminar to tell you about our progress using GIS for a national network, and to learn about traffic modelling
MINISTRY OF TRANSPORT (MOT) DIRECTORATE FOR ROADS OF VIETNAM (DRVN
)
VIETNAM EXPRESSWAY MANAGEMENT OFFICE (VEMO)
Vietnam expressway status
Completed 224 km 6.7% Under construction 487 km 14.6% Under detail design 242 km 7.3% Planned >2,374km >71.4% Name of Section
Phap Van - Cau Gie Cau Gie - Ninh Binh Ho Chi Minh - Trung Luong Lang - Hoa Lac Noi Bai Bac Ninh” Ha Noi-Lang Son (Thanh Tri Bridge to Bac Giang boundary)” Hanoi ring road 3
Total Length (km)
29 50 39.8
29 33 19 25
224.8
* Note: some sections permit motorbikes and are not strictly expressway standard
Vietnam Expressway Network
HANOI DANANG HO CHI MINH CITY
North
Central DANANG
South HO CHI MINH CITY
Data Management by GIS
Objective:
1.
Management of data on expressway alignments, sections, interchanges, toll gates, traffic volumes, implementation status, numbering system, parties involved etc.
2.
3.
Single source of data available to decision makers, Ministry staff Publishing GIS data through a website shares information with potential investors, consultants carrying out studies, Government staff, the media and the public 4.
The GIS network model potentially forms a basis for traffic modelling
Data Management by GIS
Data fields:
Expressways:
1.
2.
3.
Expressway alignment data in uniform coordinate system Attribute data: Length, status, developer, designer etc.
Interchanges
National highways:
1.
2.
3.
4.
5.
Complete road network Status of planned widening of NH1 which is the key North-South artery Traffic count data Tollgate locations and details Traffic video
Others (Reference)
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2.
3.
Industrial Zones Airports Major Ports
Challenges in data collection • No existing system for management of expressway data • Data held by multiple sources (Ministry, developers, consultants etc.) • Data often in spreadsheets (not geo-referenced), or in various coordinate systems • Data changes (alignment, ICs etc.) during project life cycle from masterplan to detailed design • Implementation schedule is continuously changing
Website Overview 1.
2.
3.
4.
5.
Data exported from GIS Uses Google Maps as background Google license terms (must be public access) Data in layers which can be turned on and off by the viewer Zoom limit applied
View of Website
Website Menu •
Menu – layers can be turned on or off
Example Data for Expressway Section
Background Options – Google Map
Background Options – Google Earth
Expressway map + Industrial Zones
Website address
• The website can be seen at:
http://www.vn-project.com/
An expressway traffic model • Previously traffic models in Vietnam have been created by JICA projects using STRADA, but have some disadvantages - Software is not in general use by international consultants - Reliability / credibility of model and results - Very few people can use / have access to data • VEMO wants to be able to own and operate it’s own model for scenario studies, revenue analysis, feasibility study
1 2 3 4 Status of developing traffic model Network model Traffic data Exists in GIS, but need to identify as nodes and links, and confirm timing of future network development 2010 data available for some national highways, but not latest Available in principle Administrative boundaries, population, land use data, vehicle ownership data Studies on diversion ratios Ongoing 5 Traffic modelling Not yet started
Next steps
1. Develop rough traffic model 2. Continue to refine the model 3. Carry out in-house studies 4. Issue the model to investors / consultants as a base model in their detailed studies 5. Use the model to review feasibility study results 6. Use the model to monitor forecast and actual diversion ratios / traffic volume / revenues
Thanks to: • ADB Project: PATA 7611-VIE: Strengthening Institutional and Financial Arrangements, Operation and Maintenance, and Governance in Road Transport • Vietnam Expressway Management Office