Okay one last time with streetcar systems grade separation is the exception  For light rail systems it is the rule  For streetcar systems multicar trainsets are very much the exception  For light rail systems it is the rule  For streetcar systems wide regional applications are the exception  For lightrail systems it is the rule  For streetcar systems high speeds mph  are as a rule not acheivable or desirable because they run on lowspeed streets  For light rail systems high speeds are desired and acheived wherever possible  For streetcar systems vehicles generally carry fewer than  people  For light rail systems trainsets generally carry more than  people  Streetcars generally resemble what have been called streetcars since the th century  Light rail generally resembles what has been called light rail since the s  I could go on and on and on but I already have  Why can you not perceive the difference between these things