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| Interstate 45 (i45) is an intrastate Interstate Highway located entirely within the
state of Texas. It connects the cities of Dallas and
Houston, continuing southeast from Houston to Galveston
over the Galveston Causeway to the Gulf of Mexico.
Interstate 45 is the only intrastate primary Interstate
Highway ending in 5, and the 2nd longest intrastate
Interstate Highway after I-87, and it is also the
shortest primary Interstate highway ending in 5 or 0. |
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| Interstate 45 replaced US 75 over its entire
length, although portions of US 75 remained parallel to
i45 until its elimination south of downtown Dallas in
1987. At the south end of i45, State Highway 87
(formerly part of US 75) continues into downtown
Galveston. The north end is at i30 in downtown Dallas,
where US 75 used the Good-Latimer Expressway. A short
continuation, known by traffic reporters as the i45
overhead, signed as part of US 75, and officially
Interstate 345, continues north to the merge with the
current end of US 75. Traffic can use Spur 366 to
connect to i35E at the north end of i345. |
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| The portion of i45 between downtown
Houston and Galveston is known to Houston residents as
the Gulf Freeway. The short elevated section of i45
which forms the southern boundary of downtown Houston is
known as the Pierce Elevated, after the surface street
next to which the freeway runs, while north of
i10 it is known as the North Freeway. Interstate 45 and
i345 in the Dallas area, north of the interchanges with
i20 and State Highway 310 (old US 75), is the Julius Schepps Freeway.
The Gulf Freeway and North Freeway both
include reversible high-occupancy vehicle lanes for
buses and other high-occupancy vehicles to and from
downtown Houston. |
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