The I-4 Ultimate Improvement Project is a planned $2.3 billion construction project spanning 21 miles from west of Kirkman Road in Orlando to east of State Road 434 in Longwood.

The project officially got underway Feb. 1, 2015, and is expected to be completed by 2021. Updates include widening I-4 to up to 10 lanes in some areas, including four express toll lanes.

Construction Limits:

• 21 miles from west of Kirkman Road to east of State Road 434
  • Area 4 – Altamonte: 6.4 miles
  • Area 3 – Ivanhoe: 4.9 miles
  • Area 2 – Downtown: 4.2 miles
  • Area 1 – Attractions: 5.7 miles

Design / Construction Cost:

• $2.3 billion

Project Improvements:

• Reconstructs 15 major interchanges
• Widens 13 bridges
• Adds 53 new bridges
• Replaces 74 bridges
• Adds 4 dynamic tolled express lanes in the median
• Rebuilds general use and auxiliary lanes along entire corridor
• Increases posted speed to 55 mph

Construction Start:

• February 2015

Estimated Completion:

• Early 2021