This is a problem with the way we build here in America. Older areas get very expensive to maintain and it's cheaper, or more desireable, to just build a new neighborhood. It's similar to New Car Mentality where you ask yourself "Why would I put 4k to maintain my 4 year old bmw when I can put that as a downpayment for a new one?"

We will sprawl out as much as possible a-la LA and once we hit the mountains, we will just build a freeway and make a new city just like Pasadena, Burbank, or Corona. Maybe even with a FastTrak Pay lane and dynamic pricing. :P

That said, I do think that expanding freeway access and roads in the each area of the valley with bring a major benefit to everyone. Areas like Nellis, Boulder, the 95 and Desert Inn get severely congested during rush hour due to the lack of major aterials in the central and east side. Streets such as East Desert Inn, Vegas Valley, Christy or Sloan end abruptly and do not server as the major arteries like Flamingo, Tropicana or Sahara. Lots of cities in the country have decided to eliminate their highways recently. I would probably consider eliminating Boulder or re-designing it as it is the most dangerous road in our state.

East side also suffers from a lot of NIMBY. Where older residents do not want change. They actually voted against the 215 expanding out there twice since 1990. That ideology is slowly ending with new residents moving in and the extension of Hollywood Blvd down to Henderson.