sentence: However , in some countries , public transportation is a nightmare because it has not been maintained by the governments properly . This is one of the main reasons which have led people to use personal vehicles rather than relying on public transportation .
modified: However , in some countries , public transportation is a nightmare because it has not been maintained by the governments properly , this is one of the main reasons which had led people to use personal vehicles rather than relying on public transportation .
transformation: PUNCT, VERB:TENSE