Interstate 80 Iowa - West

10/04/08

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10/04/08

10/04/08

The parclo B2 interchange (Exit 143) at NE 72nd Avenue was reconfigured into a six ramp exchange in 2005/06. 09/04/05

Exit 143 previously was a loop ramp from I-80 west to NE 72nd Street in Altoona. 09/04/05

I-80 west between Exit 143 and 142 prior to six lane widening. 10/04/08

Reconstruction of Exit 142 eliminated the left side ramp from I-80 east to U.S. 65 north and relocated the off-ramp to U.S. 65 from westbound. 10/04/08

09/04/05

An additional westbound lane was added along I-80 to the split with U.S. 65 south during work to rebuild the exchange at Exit 141. 10/04/08

09/04/05

I-80 west approaching the East Mixmaster Interchange (Exit 137) with I-35 north and I-235 west. 09/04/05

Exit 137B departed I-80 west for I-35 north to Ames and Minneapolis, Minnesota. 09/04/05

All guide signs for I-35 and I-235 at Exit 137 were replaced to use Clearview font by 2013. 10/04/08

Shields were posted after ramps through the North Mixmaster Interchange for both continuing routes and subsequent off-ramps previously. 09/04/05

10/04/08

The North Mixmaster Interchange was improved in 2007-09 with new roadways added between I-35 and I-235. 09/04/05

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