Freight Shifts on Reliability, Not Price

01The evidence

• Strategic modal shift programmes have been built around dedicated freight corridors and scheduled services, which are reliability interventions rather than price interventions.Government of India, PIB
• Simulation-based assessment of intermodal transport has treated reliability and monitorability as decision variables for shippers, which is the structure a reliability account requires.Research in Transportation Business and Management

02The tension

Modal shift is modelled as a cost comparison, and policy subsidises the cheaper mode. The subsidies move little freight, and the shortfall is attributed to inertia or to infrastructure gaps rather than to the variable shippers actually price.

03The theory

A shipper who cannot predict arrival cannot promise delivery. For goods with a deadline, the cost of variance is larger than the cost of transport, so a cheaper mode with a wide arrival distribution loses to a dearer one with a narrow distribution.

That makes reliability the decision variable, and it predicts a threshold: below a certain variance, price dominates and the cheaper mode wins; above it, reliability dominates and price is irrelevant.

The prediction is that modal share should correlate with transit-time variance better than with cost, and that interventions which narrow variance should shift freight without changing price.

The policy consequence is that modal shift money should buy guaranteed windows and monitoring rather than rate subsidies.

04What this is not

05Predictions

• P1Modal share should correlate with transit-time variance better than with cost.
• P2Narrowing variance should shift freight without price changes.
• P3A variance threshold should separate price-sensitive from reliability-sensitive cargo.

06What would refute it

Mode choice tracking cost at controlled variance would restore the cost model.

07What it would change

It would redirect modal-shift policy from subsidies to service guarantees.