Crucifix Lane

Druid St and Crucifix Lane?  The imagination runs wild.  Kate Mosse has written a book titled Crucifix Lane that is set here, but in the future.  What happened here in the past?
British History on-line only mentions the lane briefly as you walk through the area - "under the railway arches, by way of Crucifix Lane, a name which savours of "the olden time," "

Slow for Safely

Just a local sign?  I thought so until I saw a few more in other streets.  A campaign perhaps? They certainly do catch your attention.  All slightly different but with a similar message.