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Every limited-access road in this county's modern history was built somewhere else, and dated: this article states the edge whole, road by road, against this ground.
The Indiana Toll Road. The Indiana East–West Toll Road — Interstate 90 for its whole length, Interstate 80 joined east of Lake Station — runs 156.28 miles across the state's northern tier from the Illinois line to the Ohio line. It was publicly financed and built in the 1950s; construction began with groundbreaking on 21 September 1954 in St. Joseph County, some fifteen miles northwest of South Bend in the contemporary historical-society account of the road; it opened in stages, east to west, between August and November 1956, was formally dedicated on 17 September 1956 at South Bend, and was completed on 15 November 1956. Its St. Joseph County interchanges are South Bend's, not this town's: Exit 72, US 31 (opened 27 October 1980 in its present form), and Exit 77, SR 933 serving Notre Dame. The road's line across the county runs through its northern tier, roughly fifteen miles north of Walkerton as the register's frame measures it — close enough that Walkerton has lived since 1956 inside a county crossed by a turnpike, far enough that no Toll Road mile, ramp or plaza has ever stood on Lincoln Township ground. The Toll Road Commission's own 1954–55 report, read for this section, shows the first construction contract let for the road as a whole was for 7.4 miles through western St. Joseph and eastern La Porte counties — this county held the road's first-built ground, at its north, while its southwestern town's corridors stayed on their streets.
The St. Joseph Valley Parkway. The county's other bypass is a freeway at South Bend's rim, not Walkerton's: the Parkway — US 20 and US 31 in their modern routings — runs along the south and west sides of Elkhart, Mishawaka and South Bend. Its Indiana course was built over three decades: a southern bypass had been planned since the 1930s; the first section, begun in 1958 as Bypass US 20, opened between US 20 and Mayflower Road on 19 September 1963; it was extended past the SR 23 interchange in late summer 1965 and on to US 31 on 15 December 1967; the Toll Road interchange followed from 1979; Indiana's portion was completed eastward to County Road 17 in sections opened 11 December 1991 and 9 October 1992. The Parkway's SR 23 interchange is the one point where Walkerton's own corridor touches the bypass system: SR 23, Walkerton's north–south street, runs north into the Parkway's freeway — the town's road feeds the bypass; the bypass never comes to the town.
Walkerton's own bypass: the negative, as an article. No bypass has ever taken either of Walkerton's highways out of town. That sentence stood in the banked Transportation leg as a one-line negative "in the record reached"; this section tested it against the settler class the register names for it, the official state highway map series, and the negative holds at that strength and prints now as a finding: across the series — digitized whole by INDOT with the Indiana State Library, from the commission's first maps to the present — US 6 and SR 23 appear on their town-street alignments through Walkerton in every era in which either carries its number, and no Walkerton bypass alignment, built or designated, appears in the series or in any record reached for this section. The consequence is the town's present condition, verified in the banked legs as of November 2026: the through traffic of two numbered corridors, and SR 104's terminus traffic, still passes the diamonds, the tower triangle and the Roosevelt Road diners on ordinary town streets. The bypass age, which rebuilt the county's north around two limited-access lines, passed this town by entirely — and that, stated whole, is the bypass article for Walkerton.
Closure: DUG — Toll Road dated and distanced; Parkway coursed at county frame with its SR 23 touch; the Walkerton bypass negative printed as an article at official-map-series strength. Flag touch: SR 104's terminus at this corridor is used at #133; DF-W-25's west-vs-south forms remain open for assembly.
Sources: Indiana Toll Road record (156.28 miles; opened in stages August–November 1956; dedication 17 September 1956; Exits 72 and 77 as above), read for this section; Whiting-Robertsdale Historical Society, "The Indiana Toll Road" (groundbreaking 21 September 1954 in St. Joseph County; completion 15 November 1956); Indiana Toll Road Commission report, 1954–55 (first section, 7.4 miles, western St. Joseph and eastern La Porte counties; scheduled completion 15 November 1956), read first-hand in part; St. Joseph Valley Parkway record (sections of 1963, 1965, 1967, 1991 and 1992 as above), read for this section; INDOT, "Historic State Highway Maps Now Easily Available" (the official series digitized with the Indiana State Library), and the Transportation leg of this build.