An Act to amend section 103 of title 23, United States Code, to authorize modifications or revisions in the Interstate System
PL 90-238 (H.R.13933), enacted 01/02/1968

772 
PUBLIC LAW 90-238-.TAN. 2, 1968 
[81 STAT. 
(b) In the case of any proceeding pending before the Board on the 
date of enactment of this Act, the Board and the Attorney General 
are authorized to proceed in accordance with the provisions of the Sub-
versive Activities Control Act of 1950, as amended by this Act. 
Approved January 2, 1968. 
January 2, 1968 
[H. R. 13933] 
Highways. 
Interstate Sys-
tem. 
Modifications, 
authorization. 
74 Stat. 415. 
Public Law 90-238 
AN ACT 
To amend section 103 of title 23, United States Code, to authorize modifications 
or revisions in the Interstate System. 
Be it enacted hy the Senate and House of Representatives 
of the 
United States of America in Congress assembled^ That subsection (d) 
of section 103 of title 23, United States Code, is amended by inserting 
"(1)" immediately after " ( d ) " and by adding at the end thereof the 
following new paragraph: 
"(2) In addition to the mileage authorized by the first sentence of 
paragraph (1) of this subsection, there is hereby authorized addi-
tional mileage for the Interstate System of two hundred miles, to be 
used in makmg modifications or revisions in the Interstate System as 
provided in this paragraph. Upon the request of a State highway 
department the Secretary may withdraw his approval of any route or 
portion thereof on the Interstate System within that State selected 
and approved in accordance with this title prior to the enactment of 
this paragraph, if he determines that such route or portion thereof is 
not essential to completion of a unified and connected Interstate Sys-
tem (including urban routes necessary for metropolitan transporta-
tion) and will not be constructed as a part of the Interstate System, 
and if he receives assurances that the State does not intend to construct 
a toll road in the traffic corridor which would be served by such route 
or portion thereof. After the Secretary has withdrawn his approval 
of any such route or portion thereof the mileage of such route or por-
tion thereof and the additional mileage authorized by the first sentence 
of this paragraph shall be available for the designation of interstate 
routes or portions thereof as provided in this subsection. The pro-
visions of this title applicable to the Interstate System shall apply to 
all mileage designated under the third sentence of this paragraph, 
except that the cost to the United States of the aggregate of all 
mileage designated under the third sentence of this paragraph shall 
not exceed the cost to the United States of the aggregate of all mileage 
approval for which is withdrawn under the second sentence of this 
paragraph, as such cost is included in the 1965 Interstate System 
cost estimate set forth in House Document Numbered 42, Eighty-
ninth Congress. In considering routes or portions thereof to be added 
to the Interstate System under the third sentence of this paragraph, 
the Secretary shall, in consultation with the States and local govern-
ments concerned, give due regard to (A) routes or portions thereof in 
States in which the Secretary has heretofore or hereafter withdrawn 
his approval of other routes or portions thereof, and (B) the extension 
of routes which terminate within municipalities served by a single in-
terstate route, so as to provide traffic service entirely through such 
municipalities." 
Approved January 2, 1968.