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Puerto Rico Highway 2, the longest highway in the Commonwealth of Puerto Rico at about 156 miles (230 km) long, connects San Juan to Ponce. The road runs parallel to the northern coast of Puerto Rico (west of San Juan), then parallel to the west coast from near Aguadilla running south through Mayagüez. Shortly after Mayagüez, the road runs somewhat inland (through Hormigueros, San German and Sabana Grande) until it reaches the southern coast of Puerto Rico at Yauco, and continues to run parallel the southern shore as it approaches Ponce from the west. In addition to Arecibo, Aguadilla, and Mayagüez, the road runs through various other cities including Guaynabo, Bayamón, San Germán and Yauco. In some sections the road is a four-lane highway while in other sections the road is either a six-lane or eight-lane highway. The section of PR-2 from Ponce to the PR-22 interchange in Hatillo forms part of the unsigned Interstate Highway PRI-2. PRI-2 originally included the entire route of PR-2 until the construction of PR-22, which has since been assigned the PRI-2 designation from its western terminus in Hatillo to its eastern terminus in San Juan. ==History== PR-2 has been in use for many decades. It was initially a 2-lane road. It experienced enhancements throughout the years. In the northern coast of the island, the need for a better road was addressed with a new 4-lane road parallel to PR-2 which was designated PR-22. In the southern and southwestern part of the island, this need was addressed by improvements to the exiting PR-2 road which was already a 4-lane road. In this area, during the mid 2000s to early 2010s, the Puerto Rico Department of Transportation converted most segments of PR-2 between Mayagüez and Ponce into an expressway. The segment between Hormigueros and San German, in particular, suffered from several at-grade intersections that slowed down travel time considerably. In an effort to increase the controlled access, freeway-style character of the highway, all at-grade intersections were either replaced by overpasses or eliminated altogether. The last intersection to be converted was PR-2's intersection with PR-345 in Hormigueros. As for the western section of PR-2, the DTOP has also eyed the stretch between Mayaguez to Aguadilla for conversion into a freeway. This would occur between the future western terminus of Puerto Rico Highway 22 in Aguadilla to the Mayaguez city limits.〔()〕 The PR-22 extension to Aguadilla is planned for completion in 2016,〔 and freeway conversion of the Aguadilla-to-Mayaguez segment of PR-2 should begin shortly afterward. 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「Puerto Rico Highway 2」の詳細全文を読む スポンサード リンク
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