<prompt> Translate the following text to EnglishBaiskeli, wakati mmoja vyombo vyenye nguvu vya uhuru wa vitongoji, ni nadra kuonekana katika uwanja wa michezo; wazazi wanaogopa kwa watoto wao katika trafiki nzito ya vitongoji.  <response>: And bicycles, once the vigorous instruments of suburban freedom, are rarely spotted in the playground; parents fear for their kids in heavy suburban traffic. 