▁intended ▁for ▁a ▁specific ▁type ▁of ▁traffic , ▁or ▁for ▁several ▁types . ▁ ▁The ▁intended ▁use ▁of ▁a ▁diam ond ▁l ane ▁is ▁marked ▁by ▁traffic ▁signs . ▁In ▁most ▁areas , ▁viol ating ▁the ▁rules ▁of ▁a ▁diam ond ▁l ane ▁is ▁pun ish able ▁by ▁a ▁fine . ▁▁▁▁▁ ▁Some ▁common ▁examples ▁are : ▁High - occup ancy ▁vehicle ▁l ane ▁( HO V ), ▁also ▁known ▁as ▁a ▁car pool ▁l ane . ▁ ▁These ▁are ▁typically ▁fre ew ay ▁lan es ▁intended ▁for ▁multiple ▁occup ant ▁or ▁" green ▁vehicles " ▁( such ▁as ▁hy brid ▁or ▁electric ▁cars ). ▁Bi ke ▁l ane , ▁sometimes ▁referred ▁to ▁as ▁seg reg ated ▁cycle ▁facilities . ▁Se par ating ▁b icy cle ▁traffic ▁from ▁ped est rian ▁or ▁motor ▁vehicle ▁traffic ▁is ▁typically ▁sa fer ▁and ▁impro ves ▁traffic ▁flow . ▁▁ ▁Bus ▁l ane , ▁an ▁un cong ested ▁l ane ▁for ▁bus es ▁to ▁travel , ▁load , ▁or ▁un load ▁in . ▁Emer gency ▁vehicle ▁l ane , ▁to ▁help ▁emer gency ▁vehicles ▁get ▁to ▁their ▁destination ▁as ▁fast ▁as ▁possible ▁while ▁avoid ing ▁traffic ▁con g estion . ▁Tax ic ab ▁lan es , ▁most ▁often ▁found ▁at ▁air ports ▁or ▁other ▁trans it ▁hub s ▁for ▁passenger ▁loading ▁and ▁un loading . ▁ ▁Hor se ▁and ▁bug gy ▁lan es ▁in ▁areas ▁with ▁significant ▁Am ish ▁populations ▁ ▁Stand ards ▁The ▁U . S . ▁Department ▁of ▁Transport ation ' s ▁Man ual ▁on