Fares are a network design decision disguised as a price

This works through fare structure in the order the parts actually depend on each other.

Structure matters more than level

A modest fare charged twice for a two-leg journey can cost more than a higher fare charged once for a direct one. That difference determines whether passengers use the network as a network or only where a direct service exists.

Debates about transit affordability usually focus on the headline price, which is the less consequential variable. Structure decides which journeys are viable; level decides who can afford the viable ones.

Flat fares are simple and blunt

A single price regardless of distance is easy to understand, cheap to administer and effectively cross-subsidises long trips with short ones. Because long trips are frequently made by people travelling from cheaper outer areas, the effect on equity is genuinely ambiguous. Flat fares also make short hops uneconomic, which suppresses exactly the trips that could otherwise be walked or made by bus.

Distance-based systems address that and are harder to understand and more expensive to operate.

Capping made pay-as-you-go behave like a pass

Daily and weekly caps mean an occasional traveller pays no more than a season ticket holder for the same use. This removes the need to predict your own travel in advance, which was a real barrier for irregular and part-time workers. It also removes the sunk-cost incentive that a purchased pass created, which cuts both ways for ridership.

Account-based ticketing makes capping across modes and operators technically straightforward, and the obstacles are institutional.

Free fares are a trade, not a gift

Removing fares increases ridership, particularly among low-income and discretionary travellers, and removes fare collection cost and boarding delay. It also removes a revenue stream that funded service, so unless replaced, it buys accessibility at the cost of frequency. Experience in cities that have tried it suggests the ridership gains come substantially from walking and cycling rather than driving.

Where the objective is to reduce car use, spending the same money on frequency has generally shown stronger results.

Peak pricing shapes the load profile

Charging more at the busiest times spreads demand and defers capacity investment, and it also charges most to people with the least schedule flexibility. Shift workers, care workers and those on fixed hours cannot respond to the price signal.

On the ground, off-peak discounts achieve part of the same effect while framing it as a reduction rather than a penalty. Hybrid working has changed peak profiles substantially in many cities, which has reopened this design question everywhere.

Comparisons across cities are difficult because nobody counts the same things.

Concessions are policy carried on a ticket

Free or reduced travel for older, disabled, young or low-income passengers is a social policy delivered through the fare system. How it is funded — from transit revenue or from general government — determines whether it competes with service provision.

Where operators bear the cost without full reimbursement, concessions effectively reduce the service available to everyone. Arrangements differ substantially by country, and the funding mechanism is worth checking before comparing systems.

The takeaway

Read the fare table as a map. It shows you which journeys the system wants you to make.

Measure the walk, not the map.