REQUEST FOR PROPOSALS

three scenarios, namely, optimistic, pessimistic and most likely traffic growth.
The growth factors shall be worked out for five-yearly intervals.
4. Traffic projections should be based on sound and proven forecasting
techniques. In case traffic demand is estimated to be made on the basis of a
model, the application of the model in the similar situation with the validation
of the results should be established. The traffic projections should also bring out
the possible impact of implementation of any competing facility in the near
future. The demand estimates should also take into account the freight and
passenger traffic along the major corridors that may interconnect with the
project. Impact of toll charges on the traffic estimates should be estimated.
5. The methodology for traffic demand estimates described in the preceding
paragraphs is for normal traffic only. In addition to the estimates for normal
traffic, the Consultants shall also work out the estimates for generated, induced
and diverted traffic.
6. The traffic forecasts shall also be made for both diverted and generated traffic.
7. Overall traffic forecast thus made shall form the basis for the design of each
pavement type and other facilities/ancillary works.
4.11. Engineering Surveys and Investigations
4.11.1. Reconnaissance and Alignment
1. The Consultants should make an in-depth study of the available land width (ROW)
topographic maps, satellite imageries and aerial photographs of the project area,
geological maps, catchment area maps, contour plans, flood flow data and
seismological data and other available relevant information collected by them
concerning the existing alignment. Consultant has to arrange the required maps and
the information needed by them from the potential sources on their own. Consultant
should make efforts for minimizing land acquisition.
2. The detailed ground reconnaissance may be taken up immediately after the study of
maps and other data. The primary tasks to be accomplished during the reconnaissance
surveys include;
i topographical features of the area;
ii. typical physical features along the existing alignment within and outside ROW i.e.
land use pattern;
iii. possible alignment alternatives, vis-a-vis, scheme for the construction of additional
lanes parallel to the existing road;
iv. realignment requirements including the provision of bypasses, ROBs / Flyovers and
via-duct for pedestrian crossings with possible alignment alternatives;
v. preliminary identification of improvement requirements including treatments and
measures needed for the cross-roads;
vi.
vii.
ix.
traffic pattern and preliminary identification of traffic homogenous links;
sections through congested areas;
inventory of major aspects including land width, terrain, pavement type, carriageway
type, bridges and structures (type, size and location), intersections(type, cross-road
category, location) urban areas (location, extent), geologically sensitive areas,
environmental features;
critical areas requiring detailed investigations;