I. Highway Planning, Management, Performance Evaluation & Instrumentation

1. Highway Planning & Management

3. Evaluation of Traffic Management Measures in Urban Centers using GIS Technique – A Case Study of Kottayam Town in Kerala
Date of Start:
April 2005
(i) National Transportation Planning and Research Centre (NATPAC), Thiruvananthapuram (R)
(ii) Kerala State Council for Science, Technology & Environment (S)


Scope and Objectives

The main objective of the study is to evaluate the urban road network in light of existing traffic management system. It is further proposed to develop a methodology for a short-term traffic management plan by integration and aggregation of network - traffic data on real time basis using GIS as a supporting tool. It is also proposed to make use of user based complementary abstraction levels for spatial and temporal dimensions in analysis.

(i) Review of the existing traffic management measures adopted in the study area.
(ii) Prototype development for before and after studies of traffic scenario for each application of traffic management plan.
(iii) Identification of user preferred paths within space control frames, which are compatible with the system and the non-user.
(iv) Development of temporal and spatial visualisations of traffic conditions in a network within GIS.
The research is based on the development of a generalized approach for short term planning in an urban area. Two concepts were developed in the research namely:
(i) Concept of critical link through iterative process and
(ii) Degree of overlapping concept
Both the concepts are oriented on the user preferences and the impedance factors considered in the analysis are distance, time and cost.
The study is framed in the following four modules.
Module 1: Input phase - Data collection and generation of data scheme
Module 2: Development of GIS and GPS based road network
Module 3: Defining the architecture of the data base system:
Module 4: Analysis phase – Concepts of user preferred paths and its intervention of GIS
Module 5: Development of strategic approaches for TSM measures.
Interim Conclusions
An integration of modeling framework and GIS has been used as a scientific tool for the evaluation of existing traffic scenario and for recommending TSM actions through analysis. Planning TSM actions in light of the user preferences is a new initiative in the planning of a road network that has been attempted in this current study. Network analysis tool in ARC GIS (V 9.1) has been effectively used in planning the mobility patronage and for recommending short-term measures in a medium sized town. The concepts of critical link through iterative process and the degree of overlapping concept can be attempted irrespective of the shape and pattern of the network.
Significance/ Utilization Potential
This study bears a great significance in planning the short term as well as long-term measures in road network planning. The methodology developed in this research is significant to the Municipal Corporations, Town Planning Departments, Public Works Departments and Traffic Police who play key role in working on the mobility of the people. This is an effective tool in the hands of a planner / engineer to:
Plan the TSM actions – related to one way streets, turn restrictions, bus routing, parking, pedestrians etc to name a few.
Link prioritization
Identification of missing links
Identification of links to be widened
Recommendations for further work
The work may be extended in customization of Dynamic GIS software that can be used for network analysis. More inputs like land use, O-D survey details may be incorporated in the analysis for generalization of work to long term planning.