The average, 5th and 95th percentiles for journey times pre- and post-implementation of 20mph speed limits in Phase 1 monitoring locations, in minutes and seconds.
Y cyfartaledd, 5 a 95 canradd ar gyfer amseroedd teithio cyn ac ar ôl gweithredu terfynau cyflymder 20mya drwy ardaloedd Cam 1, mewn munudau ac eiliadau.