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27 State and Route(s) Type Purpose Sign Location Sign Type W ith si gn s f or o th er A TM st ra te gi es System Location and Other Details R eg ul at or y A dv iso ry C on ge st io n W ea th er W or k Zo ne O th er R oa ds id e O ve rh ea d Fu lly D yn am ic D yn am ic D ig its OR: US 26, I-84, SR 217 x x x x x x Near Portland. OR: I-84 x x x x Downhill truck speed advisory system. Near La Grande. OR: I-5, I-405 x x x x x In Portland OR: US 26 x x x x At an intersection with SR 47. In Staleyâs Junction. TN: I-75 x x x x x Near Calhoun. Began in 1973. TX: I-20 x x x x Test project: 6-months in 2014-2015. In Eastland County. TX: State Loop 1606 west x x x x Test project: 6-months in 2014. In San Antonio. TX: I-35 north x x x x Test project. In Temple. UT: I-80 x x x x Through Parley Canyon. UT: various x x x x 18 trailer-mounted signs in mostly rural work zones; an urban work zone application was unsuccessful. VA: I-66 x x x x x In Northern Virginia. VA: I-77 x x x x x Near Hillsville. VA: I-95/495 x x x x In Alexandria. WA: I-5 North, SR 520, I-90 x x x x x In Seattle. WA: I-90, US 2 x x x x x Dynamic digit signs are flip discs at this site. At Cascade Mountain passes. WY: I-80, I-25, SR 28 x x x x Four dynamic speed zones on over 100 miles of I-80, and over 25 miles on non-divided road SR 28. IL: I-90 x x x x x Under construction: On the Illinois Tollway northwest of Chicago. MI: US 23 x x x x x Under construction: In Ann Arbor. NV: I-15, I-515, US 95, US 93 x x x x x Under construction: In Las Vegas. MN: I-35W, I-94 x x x x x Discontinued: Other ATM strategies remain operational. In Minneapolis.
28 State and Route(s) Type Purpose Sign Location Sign Type W ith si gn s f or o th er A TM st ra te gi es System Location and Other Details R eg ul at or y A dv iso ry C on ge st io n W ea th er W or k Zo ne O th er R oa ds id e O ve rh ea d Fu lly D yn am ic D yn am ic D ig its MO: I-270 x x x x x Discontinued: Regulatory began in 2008, changed to advisory in 2011 until 2013. In St. Louis.
29 Table 4. Urban and congestion dynamic speed limit deployments in the United States. CA: I-80 (Caltrans) DE: I-295 (Google Maps) FL: I-4 â left (Georgia Public Broadcasting) GA: I-285 â right (WSB TV) MN: I-35W (University of Minnesota)
30 MO: I-270 â initial signs, left (Missouri DOT); later advisory signs, center (AAroads.com) NH: I-93 â right (Google Maps) NJ: I-78 New Jersey Turnpike (FHWA) OR: SR 217 âleft (Oregon DOT) OR: I-405 â right (Google Maps) VA: I-66 (Virginia DOT) WA: I-5 North (Google Maps)
31 Table 5. Weather dynamic speed limit deployments in the United States. AL: I-10 (Google Maps) DE: I-495 (crosscountryroads.com) IA: I-35 (KCCI) ME: I-295 (FHWA) OR: I-84 (LaGrande Observer) TN: I-75 (FHWA) TX: SL 1606 (Texas A&M Transportation Institute) UT: I-80 (Utah DOT) VA: I-77 (WSLS.com) WA: I-90 WA: I-90 (skyscrapercity.com) WY: I-80 (Wyoming DOT)
32 Table 6. Select dynamic speed limit deployments in work zones. KS (ITS Heartland) MI: I-96 (FHWA) MN (Minnesota DOT) MO (Iowa DOT) OH: US 33 (athensnews.com) UT (Utah DOT) VA: I-495 (Virginia DOT)
