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obtained. The results of the survey should bring out the VDF for each truck type<br />

(axle configuration, if the calculated VDF is found to be below the national<br />

average, then national average shall be used. Furthermore, the data from axle<br />

load surveys should be analysed to bring out the Gross Vehicle Weight (GVW)<br />

and Single Axle Load (SAL) Distributions by truck type (axle configuration).<br />

4. The Consultant shall ascertain from local enquiries about the exceptional live<br />

loads that have used the highway in the past in order to assess the suitability of<br />

existing bridges to carry such loads.<br />

4.9.6. Speed-Delay Surveys<br />

The Consultants shall carry out appropriate field studies such as moving car<br />

survey to determine running speed and journey speed. The data should be<br />

analysed to identify sections with typical traffic flow problems and congestion.<br />

The objective of the survey would be to recommend suitable measures for<br />

segregation of local traffic, smooth flow of through traffic and traffic safety.<br />

These measures would include the provision of bypasses, under-passes, flyovers,<br />

interchanges, grade-separated intersections and service roads.<br />

4.9.7 Pedestrian / animal cross traffic surveys<br />

These may be conducted to determine if provision of viaduct for<br />

pedestrians/animals is necessary to improve the traffic safety.<br />

4.9.8 Truck Terminal Surveys<br />

The data derived from the O-D, speed-delay, other surveys and also<br />

supplementary surveys should be analysed to assess requirements for present<br />

and future development of truck terminals at suitable locations enroute.<br />

4.10. Traffic Demand Estimates<br />

1. The Consultants shall make traffic demand estimates and establish possible<br />

traffic growth rates in respect of all categories of vehicles, taking into account<br />

the past trends, annual population and real per capita growth rate, elasticity of<br />

transport demand in relation to income and estimated annual production<br />

increase. The other aspects including socio-economic development plans and<br />

the land use patterns of the region having impact on the traffic growth, the<br />

projections of vehicle manufacturing industry in the country, development<br />

plans for the other modes of transport, O-D and commodity movement<br />

behaviour should also be taken into account while working out the traffic<br />

demand estimates.<br />

2. The values of elasticity of transport demand shall be based on the prevailing<br />

practices in the country. The Consultants shall give complete background<br />

including references for selecting the value of transport demand elasticity.<br />

3. It is envisaged that the 2/4-laning of the project road sections covered under<br />

this TOR would be completed and opened to traffic after 3 years. The traffic<br />

demand estimates shall be done for a further period of 30 years from<br />

completion of four/two lane. The demand estimates shall be done assuming

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