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Link to original content: http://fdot.gov/emergencymanagement/esu/
Emergency Shoulder Use (ESU)

Emergency Shoulder Use

Florida Emergency Shoulder Use

Emergency Shoulder Use (ESU) is Florida's innovative strategy to temporarily increase traffic flow and capacity during major hurricane evacuations using existing paved shoulders. First developed in 2017 and covering key corridors within the state, ESU replaced the former one-way plans, also known as contraflow and lane reversal.

When ESU is operational, all motorists except large trucks, buses, and trailers may use the shoulder as a travel lane. Motorists may enter and exit the shoulder at designated locations where law enforcement officers and posted signage indicate. ESU uses the left or inside shoulder on six-lane roadways, while the right or outside shoulder is used on four-lane roadways.

When driving in the shoulder — which are about two feet narrower than standard lanes — motorists need to slow down, navigate carefully, and watch for gutters, inlets, and places where the shoulder narrows for obstacles such as bridges, overpasses, guardrails, and barrier walls. Motorists in the shoulder will also notice a continuous noise due to the presence of rumble strips.

ESU was first implemented during Hurricane Irma in September 2017. Evacuees were able to drive on the inside shoulder of Interstate 75 northbound from Wildwood to Georgia and on Interstate 4 eastbound from Tampa to Kissimmee. ESU was also used during Hurricane Ian in September 2022, when evacuees were permitted to drive on the inside shoulder of Interstate 4 eastbound from Tampa to Celebration.

ESU Routes

ESU routes, concept plans, and standard operating procedures are reviewed annually. For the 2024 season, there are ESU plans for nine segments on seven roadways.

  • Interstate 4
  • Eastbound from US 41 in Tampa (Hillsborough) to SR 417 in Celebration (Osceola)
  • Interstate 10
  • Westbound from US 301 in Jacksonville (Duval) to US 319 in Tallahassee (Leon)
  • Interstate 75
  • Northbound from SR 951 in Naples (Collier) to Interstate 10 in Lake City (Columbia)
  • Interstate 75 Alligator Alley
  • Northbound from US 27 in Weston (Broward) to SR 951 in Naples (Collier)
  • Southbound from SR 951 in Naples (Collier) to US 27 in Weston (Broward)
  • Interstate 95
  • Northbound from SR 706 in Jupiter (Palm Beach) to SR 9B in Jacksonville (Duval)
  • Florida's Turnpike
  • Northbound from south of Hypoluxo Road in Boynton Beach (Palm Beach) to Osceola Parkway in Kissimmee (Osceola)
  • Northbound from SR 50 in Winter Garden (Orange) to US 301 or Interstate 75 in Wildwood (Sumter)
  • State Road 528
  • Westbound from SR 520 near Tosohatchee (Orange) to east of SR 417 in Orlando (Orange)

Map of Emergency Shoulder Use corridors

ESU Benefits

ESU has many benefits, especially when compared to one-way operations.

  • ESU provides additional capacity and improves traffic flow.
  • ESU may be used all day and night, while one-way operations are restricted to daytime only.
  • Far fewer resources such as cones, signs, barriers, law enforcement officers, and FDOT personnel are required to implement ESU.
  • Shorter notice is required for implementation and deactivation of ESU.
  • Flexibility exists to implement ESU by corridor or section as needed.
  • ESU does not impact opposing traffic flow, such as first responders travelling toward an incident.
  • Arterial and local roadways are not disrupted during ESU operations.

ESU Videos

You can learn more about ESU and how it works by watching our public information videos.

Additional Resources