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Interstate 69 (I-69) in the U.S. state of Texas is an extension of that existing Interstate Highway that will pass through the eastern part of the state and along the Gulf Coast to Victoria, where it will split into multiple segments with I-69E terminating in Brownsville, I-69C terminating in Pharr, and I-69W terminating in Laredo. , a 74.9 mile section of US-59 has been designated as I-69 through the Houston Metropolitan Area. The American Association of State Highway and Transportation Officials (AASHTO) has approved an additional of US 77 from Brownsville to Raymondville for designation as I-69, which will be signed as I-69E upon concurrence from the Federal Highway Administration (FHWA). FHWA approval for this segment was announced on May 29, 2013. ==Route description== The congressionally designated I-69 corridor begins at the Mexican border with 3 auxiliary routes: *I-69W begins at the entrance to the World Trade International Bridge, which connects to Mexican Federal Highway 85D, near the border in Laredo. It is co-signed with both US 59 and Loop 20 and extends 1.4 miles to I-35 (which connects to Mexican Federal Highway 85 south of the border). It will continue on US 59 east to George West, where it will intersect I-69C, it will then intersect I-37 east of George West, and it will then continue east to Victoria. *I-69C (with connections to Mexican Federal Highway 97) begins in Pharr at I-2 and is designated for 18 miles through Edinburg and co-signed with US 281. It will continue north along US 281 to George West, where it will intersect I-69W and terminate at this point. *I-69E begins just north of the Veterans International Bridge, which connects to both Mexican Federal Highway 101 and Mexican Federal Highway 180, near the border in Brownsville and continues for 53.3 miles through Harlingen, where it intersects I-2 and past Raymondville and co-signed with US 77, it is also co-signed with US 83 from Brownsville to Harlingen. The route will follow the US 77 corridor north to Corpus Christi, where a 7.8 mile segment is already designated as I-69E and co-signed with US 77 and also intersects I-37, and it will then continue north to Victoria. I-69W and I-69E will merge just south of Victoria, Texas, where mainline I-69 will follow US 59 northeast to Fort Bend County. In the Houston area, I-69 follows US 59 (Southwest Freeway) from Fort Bend County to the west loop of Interstate 610 (I-610). I-69 then follows US 59 (Eastex Freeway) from the north loop of I-610 to the Liberty-Montgomery county line. The segment of US 59 inside Loop I-610, through downtown Houston, was approved for designation as I-69 by the FHWA on March 9, 2015 and approved for signage as I-69 by the Texas Transportation Commission on March 25, 2015.〔(Minute Order 5 - March 25, 2015, Texas Transportation Commission )〕 I-69 will follow US 59 to the north, serving Cleveland, Shepherd, Livingston, Lufkin, Nacogdoches, and Tenaha. At Tenaha, I-69 will head into Louisiana along the US 84 corridor. The segment of US 59 from Tenaha to Texarkana will be signed as Interstate 369 (I-369). Since the first section of US 77 between Corpus Christi and Robstown has been signed as I-69, it implies that the I-69 mainline will follow the coastal (US-77) route from Victoria to Brownsville. This also implies that the branch along US 59 from Victoria to Laredo and the branch along US 281 from George West to Pharr are to be signed as either 3-digit spurs of I-69 (I-x69) or as separate 2-digit interstate routes. While federal legislation designating the south Texas branches as I-69 suggests that these routes may be designated as "I-69E" (east, following US-77), "I-69C" (central, following US-281), and "I-69W" (west, following US-59), the American Association of State Highway and Transportation Officials Special Committee on Route Numbering rejected the Texas Department of Transportation's request for these three designations along the proposed I-69 branches, citing that AASHTO policy no longer allows Interstate highways to be signed as suffixed routes. Stating that the I-69E, I-69C, and I-69W designations for the three I-69 branches south of Victoria, Texas were written into federal law, the initial denial of TxDOT's applications were subsequently overturned by the AASHTO Standing Committee on Highways, and the approval for the I-69E, I-69C, and I-69W branch designations were confirmed by the AASHTO Board of Directors, pending concurrence from the Federal Highway Administration during the AASHTO Spring Meeting on May 7, 2013. During this same meeting, the section of US-83 between Harlingen and Palmview was conditionally approved to be designated as Interstate 2 (I-2), with FHWA concurrence. The US-83 freeway in south Texas was widely anticipated to receive an I-x69 designation instead of I-2. In any case, Texas is proceeding in the same fashion as Indiana, conducting environmental studies for its portion of I-69 in a two-tier process. The mainline route through Texas will be approximately . On June 11, 2008, TxDOT announced they planned to limit further study of I-69 to existing highway corridors (US 59, US 77, US 84, US 281, and SH 44) outside transition zones in the lower Rio Grande Valley, Laredo, Houston, and Texarkana. Texas originally sought a public-private partnership to construct much of the route through Texas as a privately operated toll road under the failed Trans-Texas Corridor project. However, on June 26, 2008, TxDOT announced that they had approved a proposal by Zachry American and ACS Infrastructure to develop the I-69 corridor in Texas, beginning with upgrades to the US 77 corridor between Brownsville and I-37; the Zachry/ACS plan calls for the majority of the freeway to be toll-free; the only two tolled sections would be bypasses of Riviera and Driscoll. Original plans for the route included a potential overlap with the "TTC-35" corridor component as well, but the preferred alternative for that component follows I-35 south of San Antonio instead of entering the lower Rio Grande Valley. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Interstate 69 in Texas」の詳細全文を読む スポンサード リンク
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