Road America Main Entrance Tunnel

Elkhart Lake, WI back to portfolio

Road America is viewed as a premier road racing course in the USA, as well as the world. The facility hosts racing events from mid-April through October.  The four-mile track includes 14 turns with continuous elevation changes.

In an effort to improve track safety and accessibility, Road America entrusted McMahon, Inc. to design and construct a new 165-foot long tunnel under the race track to serve as the main entrance for race teams, spectators and Road America personnel.


  • Engineer-led, design/build project
  • Removal of existing bridge/tunnel
  • Pre-Cast Tunnel Sections (less affected by weather; reduced cure time; fast erection)
  • 165-ft long x 36 ft. wide
  • Minimum clearance height of 16’-8”
  • 2 – 12’ driving lanes, 2 – 6’ sidewalks
  • Over 1,000 ft. of gravity storm sewer for drainage (25’ deep)


  • Short, 4-month construction period – all during winter months
  • Alignment of tunnel with existing roadways and grades
  • Winter conditions necessitated protection of backfill and concrete to prevent freezing
  • Large sign addition, after construction of tunnel was complete


Road America


165 Feet

Project Manager

Tom Kocken, Jeff Kellner