01
Road-user time
Queues, detours and journey reliability: affected traffic × additional delay × the selected value of time.
Infrastructure owners
A road’s cost
extends beyond construction.
Investment decisions benefit from considering maintenance, disruption duration and effects on road users. These items should be quantified separately using verifiable assumptions.
Indirect costs to bring into the discussion.
02
Vehicle operation
Additional distance, fuel, wear and maintenance associated with detours or pavement condition.
03
Economic activity
Business access, deliveries, productivity and service continuity. Document local effects and avoid counting the same losses twice.
04
Safety and quality of life
Work-zone exposure, emergency access, noise, dust and congestion emissions. Distinguish measured effects from estimates.
The InnovAct economic reference case.
| Item | Conventional | BLHP |
|---|---|---|
| Initial construction | 778 354 $ | 882 083 $ |
| Discounted maintenance and rehabilitation | 162 872 $ | 54 232 $ |
| Residual value deducted | 79 685 $ | 141 623 $ |
| Discounted life-cycle cost | 861 541 $ | 794 691 $ |
The scenario shows an approximately 13.3% higher initial cost and 7.8% lower life-cycle cost. It uses a 30-year horizon, a 4% discount rate and a 3.75 m width in the cost table, excluding excavation. Width differences with the environmental analysis need harmonisation before a new comparison.
InnovAct · 2020 · Pavement study · French PDFPrepare a comparable estimate.
Set the required service
Traffic, service period, acceptable maintenance, safety and access.
Price both designs
Excavation, materials, transport, placement, drainage, quality, traffic management and contingencies.
Test assumptions
Variations in prices, schedules, maintenance and residual value.
Reference framework
Compare options for your network.
BLC seeks to work with designers and infrastructure owners on documented scenarios.