why are the different roads in U,S. are named as Road,Blvd,Avenues,Street,Prky,Drive and lanes?

Answer 1

'Street' may be used for any thoroughfare
'Road' may be used for any thoroughfare
'Way' may be used for major roads
'Avenue' may be used for residential roads
'Drive' may be used may be used for residential roads
'Grove' may be used for residential roads
'Lane' may be used for residential roads
'Gardens' may be used for residential roads (subject to there being no confusion with any local open space)
'Place' may be used for residential roads
'Crescent' may be used for a crescent shaped road
'Close' may be used for a cul-de-sac only
'Square' may be used for a square only
'Hill' may be used for a hillside road only
'Circus' may be used for a large roundabout
'Vale' may be used for residential roads (only for exceptional use)
'Dene' may be used for residential roads (only for exceptional use)
'Rise' may be used for residential roads (only for exceptional use)
'Mead' may be used for residential roads (only for exceptional use)
'Mews' is considered acceptable in appropriate circumstances.

Answer 2

so the map makers have something to put on the paper and it also designates the type of highway, alley, path, tollway, bridge, footpath, track, thoroughway, one way, cross street, and on and on ------- if you just called it ""Jones"" how would you know if you were driving to an address or if you were lost and looking for "John J. Jones" === the road designation gives you a clue of destination and delineation and it also makes for good order as opposed to chaos...........