Computers in Urban Planning

• Computational aids – implementation of mathematical models, statistical analyses

• Data handling & intelligent maps – GIS (Geographic Information Systems); display and communications devices; production of maps and charts

• Computer aided design including visualization tools

ROLE OF GIS IN IMPROVING THE FLEXIBILITY AND RELIABILITY OF

URBAN TRANSPORTATION PLANNING AND MANAGEMENT

Based on a paper presented at the 2001 CUPUM Conference by Ata M. Khan and Jennifer M. Armstrong

Planning and Management Requirements

Planning, Design and Implementation

System Operations & Management

Infrastructure Management: Maintenance/Rehabilitation

The Components of GIS-T

Technology. Hardware. Software

Data CaptureData Integration

Users & TheirRequirementsInstitutions

ENHANCED FLEXIBILITY & RELIABILITY

Selected Tasks that can be assisted:

- Executive Information Systems

- Multimodal Transportation Planning

(e.g. demand forecasting)

- System Management

- Environmental Impacts

- Etc.

Urban Transportation Planning in a GIS Environment• Geocoded Land Use Data

• Geocoded Travel Survey Data

• Transportation Networks & Attributes in GIS Format

• Travel Analysis

• Energy Consumption, GHG Emissions, Air Quality

• Etc.

Urban Transportation Planning in a GIS Environment

Land Use Data (Geocoded)Transportation System Network (Geocoded)

Geocoded Travel Survey Data

Travel AnalysisAssigned Link Volumes, Capacity & LOS,

Link Avg. Speed

Energy Consumption & GHG Emissions, Air QualityEconomic Factors

Evaluation, Choice & Implementation

Example of Flexibility Enhancement: NOx Emissions (Kg/Km) -PM Peak Hr.

BASE NETWORKUSER DEFINED LINK DATA 3

00-06-01 12:37MODULE: 2.13RMOC........ja

EMME/2 PROJECT: 1995 land use, 1995 TRANS model calibration:emme2ban.n95SCENARIO : 30 Copy of Scenario3 -- 1995 network

WINDOW:361829/5026839371646/5034202

LINKS: ci=0 & cj=0

@area

COL-IND:

SCALE: .5

Example of Reliability Enhancement in Transportation Planning

• National Capital Region (Canada) network

• Task: to estimate intra-zonal trip lengths

• O-D survey records geocoded using TransCAD

• Use of shortest path algorithm within TransCAD -- Macro written to Calculate trip lengths

Typical TransCAD Road Network with Geocoded O-D

Example of Reliability Enhancement

in Transportation Planning (Cont.)

• GIS Approach: 376,000 Veh-Km/day of intra-zonal travel.

• Conventional Factor Approach: 340,000 Veh-Km/day.

• Difference: 10.6%

• Also, the Factor Approach consistently tends to underestimate trip lengths.

CONCLUSIONS

• Improved flexibility of Urban Transportation Planning, Operations & Management.

• Enhanced accuracy of analytical procedures and results.

• Maximum use of geocoded data.• Executive Information Systems -- for efficient project/program approval process.