U.S. Federal Route 136 runs east-west across the far-southern portion on Mc Lean County. For the most part, this route is a straight two-lane highway. U.S. Rt. 136 passes through the following towns in Mc Lean County. Mc Lean
Heyworth
U.S. Rt. 136 is not multi-plexed in Mc Lean County. U.S. Rt. 136 intersect the following highways in Mc Lean County. Interstate 55, at Mc Lean. U.S. Rt. 51, at Heyworth. Interstate 74, near Le Roy. U.S. Rt. 150, near Le Roy.