The trailblazer system was originally constructed for the US 45 construction
project in 2000-2001. It consists of a network of signs
placed on WIS 100 to inform travelers of closed ramps and where they
can enter onto the freeway. Each sign has arrows pointing to the
direction travelers need to go to enter the freeway system.
There are currently six key intersections fitted with
trailblazer signs on WIS 100 where travelers would normally access
The Blue Route is an alternate route signing concept for when a major incident on the interstate requires
a lengthy closure or results in major
When a major incident occurs on I-39/90/94 around Madison, electronic message signs
will instruct interstate travelers to
follow the Blue Route. Beginning at the next exit, static Blue Route signs have been installed that lead
drivers off the interstate and along the Blue Route.
electronic signs can be activated remotely, allowing the State
Patrol and other responding agencies to better focus their resources
on the critical incident scene.
The Blue Route uses US 51 (Stoughton
Road) from US 12/18 (the Madison Beltline) at the south to its
intersection with I-39/90/94 at the north.
I-39/90/94 alternate route study in
Dane, Rock and Jefferson counties
WisDOT's Southwest Region's alternate route study is examining
the freeway corridors in the Madison area to select alternate routes
in the event of a crash or other emergency. These routes will be
used to detour motorists and help them avoid major delays.
The study involves input from WisDOT, State Patrol, county,
city, regional and private sector representatives who will develop
an alternate route guide that best meets the needs of
The study corridors include I-94 between Madison and Milwaukee,
and I-39/90 between Madison and Janesville.