Origins: most of us probably don't stop to ponder why the maze of us interstates and highways we travel in our automobiles are numbered the way they are — just trying to find north-south examples: interstate 5 runs through california, oregon, and washington, from the mexican border to the canadian border. The interstate highway system in oregon a historic overview prepared for ~ the ' i 1 oregon list of figures cover east end of morrison bridge, portland, february 12, 1966 figure 1 what freeways mean to your city, january 1963, automotive safety foundation, washington dc.
Improvements to the columbia river highway and old oregon trail highway had been planned since the 1930s, but world war ii delayed those plans the oregon state highway division started implementing these improvements segment by segment beginning in the 1950s as bond funding.
Aug 1, 2008 when the federal interstate system grew up, the southern california area got its share of funding and road numbers however, for the first 20 years enterprising researchers are invited to do further analysis on california's east- west state roads to distinguish nocal from socal usage crown, arthur says.
To follow this evolution, this paper traces the history of roads across southern wyoming, concentrating on the transcontinental highway and its influence on five if the first transcontinental highway in wyoming was the oregon trail over south pass, it was the most difficult highway, without accurate maps and with poor.