Low clearance bridges on I-45

14 spots where I-45 has less than 16 ft of clearance, in the order you drive them from south to north. The lowest is 14 ft 2 in in Texas, At I-45 / I-610 N Loop. 6 are under 15 ft.

Posted signs and your permit come first. These are the clearances Texas reported to the federal National Bridge Inventory in 2025. Repaving, snow and new work can lower them.

15 ft 5 in under I-45 NB / I-610 WB · I-45 15 ft 1 in under I-610 WB · I-45 15 ft 5 in over I-610 WB FR · I-45 15 ft 9 in under SH 35 NB Conn · I-45 14 ft 4 in under I-69 NB / I-45 NB · I-45 14 ft 7 in over US 59 & Railroad Misc Street · I-45 14 ft 9 in under W Dallas Street · I-45 14 ft 11 in under North Street · I-45 15 ft 3 in under N Main Street · I-45 14 ft 9 in under Cottage Street · I-45 14 ft 2 in under I-610 WB · I-45 15 ft 10 in under Osr · I-45 15 ft 10 in under County Road 400 · I-45 15 ft 8 in under West Roane Road · I-45

Texas · 14 under 16 ft

Clearance	Where	County
15 ft 5 in	Under I-45 NB / I-610 WB · I-610 @ I-45 (Interchg) · Map	Harris County
15 ft 1 in	Under I-610 WB · I-610 @ I-45 (Interchg) · Map	Harris County
15 ft 5 in	Over I-610 WB FR · I-610 @ I-45 (Interchg) · Map	Harris County
15 ft 9 in	Under SH 35 NB Conn · Junction SH 35 @ I-45 · Map	Harris County
14 ft 4 in	Under I-69 NB / I-45 NB · I-45 / I-69 Interchange · Map	Harris County
14 ft 7 in	Over US 59 & Railroad Misc Street · SW of Downtown Houston · Map	Harris County
14 ft 9 in	Under W Dallas Street · 0.10 mi S of Allen Parkway · Map	Harris County
14 ft 11 in	Under North Street · 0.75 mi N of I-10 · Map	Harris County
15 ft 3 in	Under N Main Street · 1.00 mi N of I-10 · Map	Harris County
14 ft 9 in	Under Cottage Street · 1.25 mi N of I-10 · Map	Harris County
14 ft 2 in	Under I-610 WB · At I-45 / I-610 N Loop · Map	Harris County
15 ft 10 in	Under Osr · 2.25 mi W of SH 75 · Map	Madison County
15 ft 10 in	Under County Road 400 · 1.8 mi S of FM 977 · Map	Leon County
15 ft 8 in	Under West Roane Road · 1.25 mi N of BS 31 · Map	Navarro County