I make a daily commute on I-10 from Katy (Fry Rd.) to downtown every weekday, and while the construction has truly been a nuisance, I can already see vast improvement. I can't wait for all the additional lanes to be finished. It will be a loooong time . . .
In regards to I-10 schematics, try looking at www.katyfreeway.org for up to date info on the project. It has been an excellent source of information, and two pages with in the site are points of particular interest (for me anyways) - http://www.katyfreeway.org/SH6_IH610_cross.html and http://www.katyfreeway.org/contractB_final...ty_before_after
Hope this helps you to visualize it.