▁cycle . ▁ ▁Similarly , ▁cycle ▁paths ▁often ▁have ▁b oll ards ▁or ▁S - b end ▁paths ▁to ▁prevent ▁motor ▁vehicle ▁entry , ▁and ▁the ▁entry ▁is ▁often ▁spac ed ▁for ▁u pr ight ▁b icy cles , ▁but ▁may ▁be ▁too ▁narrow ▁or ▁require ▁too ▁sharp ▁of ▁a ▁turn ▁to ▁allow ▁through ▁some ▁vel om ob iles . ▁ ▁Electric ▁assist ed ▁vel om ob iles ▁▁ ▁Some ▁vel om ob iles ▁have ▁been ▁converted ▁to ▁provide ▁electric ▁assist . ▁Electric ▁assist ▁means ▁that ▁a ▁small ▁battery - oper ated ▁electric - prop ulsion ▁system ▁is ▁provided ▁to ▁assist ▁the ▁driver ' s ▁leg ▁mus cle ▁effort . ▁Most ▁electric - ass ist ▁prop ulsion ▁mot ors ▁are ▁of ▁the ▁in - w heel ▁design ▁in ▁the ▁rear ▁wheel , ▁such ▁as ▁ge ared ▁hub ▁mot ors ▁( like ▁e Z ee , ▁Hein z mann , ▁B af ang , ▁B MC , ▁etc .) ▁and ▁direct - drive ▁hub ▁mot ors ▁( like ▁Cry stal y te , ▁B ion X , ▁ 9 Cont inent , ▁etc .) ▁but ▁mid - drive ▁units ▁( like ▁S unst ar , ▁Cy clone , ▁E cos pe ed , ▁etc .) ▁are ▁used ▁as ▁well ▁due ▁to ▁design ▁constraints ▁in ▁vel om obile ▁models ▁with ▁one - s ided ▁rear ▁wheel ▁mount ing ▁like ▁the ▁Qu est , ▁Str ada ▁and ▁M ango ▁or ▁front ▁wheel ▁drive ▁in ▁the ▁Vel ay o , ▁or ▁better ▁efficiency ▁by ▁using ▁the ▁multiple