Work out modal split estimate instantly with clear inputs, formula shown and shareable results.
Modal split allocates total trips between modes. Because the entered shares rarely sum to exactly one hundred percent in practice, they are normalised before being applied, and the raw sum is reported so any data error is visible. Car trips are the figure that converts into road capacity and parking demand.
Modal split
Trips by mode = total trips x mode share / sum of shares entered
Trips by mode = total trips x mode share / sum of shares entered. Modal split allocates total trips between modes.
Survey shares often omit minor modes or double count linked trips. Normalising preserves the relative proportions, which is what the modelling actually depends on.
This calculator takes 4 inputs: Total daily trips, Car share, Public transport share, Walk and cycle share. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.