Ay carumba. You want to decrease traffic in the face of real estate development? Cut off access to automobiles. Prevent left hand turns (like the one that killed a cyclist at this same intersection a year and a half ago).

Widening a congested road like this only leads to one thing: a congested road that is wider.

Give people going to the hotel complex more transportation options (light rail would be nice) like: protected bus lanes, protected bike lanes, wide sidewalks, pedicab and taxi standing areas. All of the above, integrated into a modestly larger transportation network, will truly reduce the demand for more private automobile space.