There are 3 red routes in Croydon: the A22, A23 and A232.
Red routes are marked by red lines. These mean no stopping, with the following exceptions:
Red parking bays
Indicated by red box markings. There are several types - some allow short term free parking, others allow loading and unloading. The restrictions are shown on nearby signs.
White parking bays
Indicated by white box markings. Loading, unloading and parking are permitted within these any time of day. The rules are clearly indicated on the adjacent signs.