226.390. When the construction of sections of the parkwayroad parallel to existing highways will result in unnecessaryexpense and the secretary in his discretion does use existing orprojected sections of streets or highways, bridges, parks, orother areas as connecting links between other sections of thisparkway, and federal funds are expended for parkway purposesthereon under the provisions of such act, no parkway area creditsneed be allowed the state therefor. In the event it isdetermined that such connecting links of highways should providefor other than passenger car traffic, a cooperative agreementwith respect to such use and the reconstruction, maintenance andcontrol thereof may be entered into by the secretary with thestate transportation department or local public authoritiesconcerned. Alternate routes through or around urbanareas, along scenic country or connecting historic sites, may beprovided or required for acceptance by the secretary for parkwaypurposes.
(RSMo 1939 ยง 8802)