From IAH to Webster, I’d suggest I-59 south, then exit onto I-45 south. (It’s a right exit, not too far past Loop 610...start staying to right once you pass the loop).
Traffic should be fine, until you have to exit to I-45... then, it’s going to suck.
I wouldn’t take either loop (610, or Beltway 8) unless it is raining. If it is? you might want to consider it. No tolls on 610, that’s the way I go when weather is bad. About $7 worth on Beltway 8... Usually better to just tough it out on the free roads. Just, expect it to take 1 1/2 hours.
From Post Oak? You pretty much have to start on 610 Loop, Northbound to start. From there? You have two options.
1) Hardy Toll Road North. (Tolls ~ 3.75) During high traffic times? I recommend taking this one.. it goes RIGHT where you want to go. There is an exit for IAH.
2) Exit I-10 East.. get immediately into the left lane, then take I-59 North. There will be signs for IAH. AVOID I-45 North. It’s a disaster, usually. 59 moves faster.
But, the Hardy is probably your best option. In high traffic times? Allow at least 1 hour.
Good luck!
BTW>> I’m heading there tomorrow. There is a HUGE conference going on. The Off Shore Technology Conference. More than 80,000 people. And, there are a few other conferences going on as well.
ALL the restaurants and entertainment sites will be PACKED. Be sure to make a reservation in advance for ANY nice place. It’s always recommended, in Houston. But, this week? It’s a MUST. It’s going to be CRAZY!
FWI>> I was born in Houston. Lived there most of my life. I fly there AT LEAST once a month for business, sometimes more.. so, I’m pretty familiar with the routes to/from the airport. :-)
The trick to the traffic is: Always give yourself more time than you think you need.. and, BE PATIENT. You WILL get there, it will just take time.
I was going to advise you to listen to AM740... for traffic reports. But, if you don’t know the roads, I don’t think they help you that much.
Thanks. It’s going to be a long week.