Date: | 1961 |
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Description: | International TD-30 crawler tractor (TracTracTor) working to widen U.S. Highway 40 near Berthoud Pass in Colorado. The highway wound through the Rocky Moun... |
Date: | 1961 |
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Description: | Construction of the Badger Interchange of I-90 and I-94. |
Date: | 1961 |
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Description: | Construction at an unidentified interstate highway intersection in Wisconsin showing the scaffolding in place on a completed span on which the upper span w... |
Date: | 1961 |
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Description: | View taken from below of the Interstate Highway I-535 bridge during construction. |
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