US 41 was later rerouted in 1999 when the proposed plan to widen Layton Boulevard was successfully blocked by residents and city officials. Because Layton would no longer meet state highway standards, US 41 was rerouted to follow I-94. The section of the Stadium Freeway south of I-94 was given the WIS 341 designation in August 1999.
US 41's rerouting in 1999, due to Layton Boulevard's failure to meet state highway standards, led to a change in its route and the assignment of WIS 341 to the Stadium Freeway section south of I-94.