A static crimson "X" means the lane is in use for oncoming traffic. This arrangement was introduced from the nineteen nineties, replacing a slow operation where by lane markers were being manually moved to mark the centre median.[citation necessary] In 1942 the pylons were being modified to incorporate parapets and http://kylervoeyq.thezenweb.com/The-best-Side-of-Building-Designer-Upper-North-Shore-21709417