 While the Lincoln Highway has not been an official route for 90 years , it is still a source of pride in the communities and regions through which it passed . Nearly 85 percent of the original Lincoln Highway is still drivable , although much is gravel . Most of what is drivable is either along US 30 or within one mile ( 1 @.@ 6 km ) . The Lincoln Highway bridge in Tama was built in 1915 . It was restored in the 1980s after local officials feared losing the then @-@ deteriorating bridge . Preston 's Service Station , a landmark of Belle Plaine , has become a Lincoln Highway museum . Monuments were built along the route to honor not only Abraham Lincoln , but to honor Iowans who were influential for planning its route . 
