I think it is Disney's way of catering to the lowest common denominator. In other words, many people (perhaps if they only have a daughter) may not be very familiar with Cars. So by naming a land "Radiator Springs"...it may not register to them that it is "Cars". The same argument can be made for why Universal called Hogsmeade "The Wizarding World of Harry Potter". It's about blatantly stating the character and not the place.
That would be the cynical view, yes. And not that I can't be cynical at times, but...
It could also be the typical way that an unfettered WDI gets
really detail focused and oriented.
Cars Land at DCA is not just the town of Radiator Springs. Although Radiator Springs is a big chunk of the "land", there are parts of the land that are technically well beyond city limits. Cars Land encompasses Radiator Springs obviously, but as the sign says, Radiator Springs is the
Gateway to Ornament Valley, and Cars Land features some of its most prominent landmarks and landscape beyond the city limits out in the Ornament Valley section of the land.
http://datelinedisneyland.smugmug.c...d-Update-Photos/i-Pbxpz7m/0/X2/IMG1151-X2.jpg
These sections of the land are not in town, they're way outside of town, but it's still obviously Cars Land...
http://farm8.staticflickr.com/7220/7371120428_99128fe6dd_c.jpg
http://1.bp.blogspot.com/-WFtDUyDBQXA/T5c9buwd0yI/AAAAAAAAGZ4/yFPqx29y_o0/s1600/photo(2).JPG
Now, if you want to get picky about place names, it would be more appropriate if they had called the land "Carburetor County", as both the town of Radiator Springs and the Ornament Valley and Cadillac Range are within county limits as shown by this map...
http://pixar.wikia.com/File:Carburetor_county_radiator_springs.jpg
So the real question should be...
Why is Cars Land not called Carburetor County?!?
Do the county board of supervisors know that Pixar has circumvented their authority by labeling county land with the new place name of "Cars Land"? Someone needs to get this on the agenda for the next County board of supervisors meeting! Call over to the Cozy Cone and alert Miss Sally so she can draft the Cease & Desist order to be sent to those Pixar people out in Emeryville!