Therehavebeenalotofchangesinthecity'stransportation.Nowadays,therearemorepeopleandasaresult,therearemorecars,moreundergroundsubwaysandmorebikes.Duringrushhours,itishardtogetonthebusorthesubwayandevenhardertogetoffaftermoreandmorepeoplegeton.Bikesarethebettermeanstogetaroundthecitybecausetheyareeasytopark.Besides,theydon'tcauseasmuchpollution.Therearemanypeoplewhodriveinviolationofthetrafficrules,soitisimportanttokeepourselvessafeonthestreet.
城市的交通有很大的变化.现在,人越来越多,所以有更多的轿车,更多的地铁和更多地自行车.在高峰时间,上公交车或者地铁很难但是当更多的人上车后下车会更难.自行车是比较方便的在城市里穿梭的交通工具因为他们很容易停放.此外他们不会引起环境污染.有很多人违反交通规则行驶,所以在街上保护我们自己的安全是很重要的.