NEW YORK — Pedicabs will have to follow new rate rules by next summer under a plan Mayor Michael Bloom­berg signed Thursday to rein in runaway fares for the pedal-powered taxis.

The new law aims to keep pedicab passengers from being taken for a ride by confusing charges that can add up to more than some airline tickets. In one infamous episode this summer, a Texas family paid more than $400 for a 14-block pedicab jaunt.