Task 2 Data Collection and Analysis of the Existing Urban Transport Environment

Task 2-5 Analysis of Existing Traffic/Transport Conditions

Based on the information/data collected and analyzed above, a basic analysis of existing transport and traffic conditions should be carried out to identify the characteristics and issues for each city.

(1) Analysis of Travel Characteristics

Based on the results of the traffic surveys, the travel characteristics of the metropolitan region should be analysed:

Major Travel Pattern: Major travel patterns must be identified from the results of the base-year modelling analysis. The following drawings may be prepared:

  • Desire line drawings: Desire lines can be used to represent travel demand. Through such drawings, major travel corridors can be identified.
  • Drawings of major traffic corridors: The major movements should be shown as traffic corridors. Usually such corridors follow the trunk road network, such as along national highways.

Trip Characteristics: The following trip indices should be presented in the CMP:

  • Trip length distribution;
  • Average trip length;
  • Average cost of trip;
  • Trip rate (trips/person/day);
  • Modal share (with and without walking); and
  • Average occupancies for each mode.

(2) Analysis of Vehicular Traffic and Bottlenecks

Vehicle Traffic Characteristics: The following information may be summarized, based on the output of the base-year transport demand analysis:

  • Drawing showing volume/capacity (V/C) ratios on the road network;
  • Drawing showing travel speeds on the road network; and
  • Average travel speed in the city.

Bottleneck Analysis: Bottleneck road sections, intersections and level crossings should be identified. Bottleneck sections on roads are usually identified by examining V/C ratios. Roads with the highest V/C ratios are most likely to suffer from bottlenecks. The reasons for the bottlenecks identified should be analyzed, e.g., insufficient road capacity, lack of alternative routes. It should be noted that this analysis is mainly for vehicle trips and not for trips by NMVs and public transport.

(3) Analysis of Social Conditions

Social considerations are an essential part of urban transport development. Urban transport for the poor should be considered at all stages of development. The following indices, which can derived from the household O-D survey, may be useful to assess social conditions:

  • Distribution of income level;
  • Average trip length by income level by purpose;
  • Per capita trip rate by income level; and
  • Vehicle ownership rate (bicycle, motorcycle and car) by income level.

(4) Identification of Issues

From the data collection and analysis described above, a comprehensive list of issues and problems concerning the transport network should be compiled, with an indication of severity. These issues will form the basis for further study and recommendations, in devising appropriate, strategic and sustainable solutions.

Survey Form 6-1A shows typical problems or issues that may arise within a city’s urban transport system. The list is by no means exhaustive and other specific issues in each city should be described.

(5) Comparative Analysis of Urban Transport Environment

Extensive data collection and analysis in 30 cities was carried out by Ministry of Urban Development. The statistical information contained in this study provides an opportunity to compare mobility conditions of various cities and therefore to identify specific mobility issues of the concerned city. The indices shown in Table 11 can be used to diagnose mobility issues.

Table 11 Index for Comparative Analysis

Index Description Average Value Data Source
Congestion 1 - (Average travel speed/30) 0.25 Base-Year Traffic Model
“Walkability” (Footpath length / Length of major roads in the city) x 0.5 + (rate estimated based on estimates of available pedestrian facilities) x 0.5 0.52 Road Infrastructure Survey
City Bus Transport Number of public and private city buses per 100,000 people 14 Public Transport Survey
Safety (Number of annual traffic accident deaths per 100,000 people) x 0.5 + (Number of fatalities per 100,000 people) x 0.5 0.10 Traffic Safety Survey
Paratransit Number of paratransit vehicles per 100,000 people 61 Public Transport Survey
Slow Moving Vehicles Slow moving vehicle share in total trips 0.07 Household O-D Survey
Trip Distribution Average trip length (km) 5.2 Household O-D Survey
NMVs Number of NMVs per 100,000 people To be prepared Socio-economic survey
Passenger Vehicle Number of passenger vehicles per 100,000 people To be prepared Vehicle Ownership Survey

Based on the above, a diagnosis of transport conditions in the subject city can be undertaken. The flowchart and checklists shown in Annex 5 may be used to identify high priority measures.

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