I-45 League City to N side of Houston - clearance?

As a native Houstonian, I don't recall any low clearance bridges or overpasses on 45. The lowest TXDot lists is 13 1/2.

I-45 through downtown Houston isn't a good route for trucks or RVs. More and more cities are prohibiting hazardous carriers on freeways through the city center.

Many folks, including me, use I-610 or Beltway 8 (Toll Road) to avoid downtown Houston.

There are a couple of tight curves with lane changes required in the middle of the curve in heavy traffic when crossing the I-10 intersection on I-45.

Most importantly for me - the elevated section of I-45 from just past the I-610 split to the I-10 junction is severely washboarded due to shifting of the concrete slaps. Bounces the trailer significantly. As bad as the I-10 section across the swamps in Louisiana.

I should add - I avoid downtown north to south/S-N, I use I-10 east to west/W-E