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Interstate 24
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=== I-24 SMART Corridor === The {{convert|28|mi|km|adj=on}} stretch of I-24 between I-440 (exit 53) in Nashville and US 231 (exit 81) in Murfreesboro is currently in the process of being developed into the "I-24 SMART Corridor" in an effort to address congestion and mobility issues.<ref>{{cite web |title = I-24 SMART Corridor |url = https://www.tn.gov/tdot/projects/region-3/i-24-smart-corridor.html |publisher = Tennessee Department of Transportation |access-date = May 13, 2022 |archive-date = April 17, 2022 |archive-url = https://web.archive.org/web/20220417120338/https://www.tn.gov/tdot/projects/region-3/i-24-smart-corridor.html |url-status = live }}</ref> In recent years, this stretch of I-24 has become the most congested highway corridor in the state, due to the rapid growth of the region. The project pairs this stretch with the adjacent paralleling stretch of US 41/US 70S (Murfreesboro Road) and all connecting roads in between. The first phase, which ran from October 2018 to December 2021, included the construction of emergency pull-offs, improvements to multiple entrance and exit ramps, the erection of additional roadside [[dynamic-message sign]]s (DMSs), and upgrades to traffic signals along the corridor.<ref name="SMARTtimeline">{{cite web |title = I-24 SMART Corridor Timeline |url = https://www.tn.gov/tdot/projects/region-3/i-24-smart-corridor/timeline.html |publisher = Tennessee Department of Transportation |access-date = May 13, 2022 |archive-date = May 13, 2022 |archive-url = https://web.archive.org/web/20220513053707/https://www.tn.gov/tdot/projects/region-3/i-24-smart-corridor/timeline.html |url-status = live }}</ref> The second phase, which began in March 2022, includes the erection of 67 overhead gantries with signs between mileposts 53 and 70 that will display recommended [[variable speed limit]]s and variable lane control signs for each lane.<ref>{{cite news |last1 = Wenzel |first1 = Joe |last2 = Sulek |first2 = Marissa |title = TDOT: Construction to Start on Phase 2 of I-24 SMART Corridor Next Month |url = https://www.wsmv.com/2022/03/25/tdot-construction-start-phase-2-i-24-smart-corridor-next-month/ |access-date = May 13, 2022 |publisher = [[WSMV-TV]] |date = March 25, 2022 |location = Nashville, Tennessee |archive-date = March 25, 2022 |archive-url = https://web.archive.org/web/20220325165223/https://www.wsmv.com/2022/03/25/tdot-construction-start-phase-2-i-24-smart-corridor-next-month/ |url-status = live }}</ref><ref>{{cite news |last1 = McCarthy |first1 = Darby |title = I-24 SMART Corridor Project Begins Phase 2, Lane Closures from Nashville to Murfreesboro Beginning in April |url = https://www.newschannel5.com/news/i-24-smart-corridor-project-begins-phase-2-lane-closures-from-nashville-to-murfreesboro-beginning-in-april |access-date = May 13, 2022 |publisher = [[WTVF-TV]] |date = March 27, 2022 |location = Nashville, Tennessee |archive-date = April 19, 2022 |archive-url = https://web.archive.org/web/20220419110113/https://www.newschannel5.com/news/i-24-smart-corridor-project-begins-phase-2-lane-closures-from-nashville-to-murfreesboro-beginning-in-april |url-status = live }}</ref> The final phase will include the installation of [[ramp meter]]s on certain onramps and the installation of additional [[closed-circuit television]] (CCTV) cameras and DMS boards and [[Americans with Disabilities Act of 1990]] (ADA) improvements along connecting arterials.<ref name="SMARTtimeline"/>
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