If the DCTA east-west corridor ever happens
It's a long term plan, but Gods I would love to see this. Granted, this is the time to drive the likely route, so it's not quite a realistic estimate, but even so.
This is sort of a rough estimate based on the destinations listed on the proposal (Colony, Highland Village, Flower Mound, Northlake) and my guess at a likely route.
As it is, if you work in Westlake, your only option is to drive. Even if the commute were an hour and a half, I'd be happy to be less car-dependent.