Construction Planning and Management
Preliminary project report for a road project must contain

The detailed estimated cost based on detailed design
The contract documents for inviting tenders
The several alternatives of the project that have been considered
The soil survey, traffic survey, concept design and approximate cost

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Construction Planning and Management
Crash project duration is obtained by summing the

Crash durations for all the activities along the critical path obtained by taking into account the crash duration for all the activities
Normal durations for all the activities
Crash durations for all activities
Crash durations for all the activities along the critical path obtained by taking into account the normal duration for all the activities

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