Last Friday, the intersection of IA 21 and Shaulis Road on the south side of Waterloo closed for construction of turning lanes and signals, the Iowa DOT said in a press release.
Until a decade ago, IA 21 went all of its 98 miles without a stoplight. Then signals were added to the ramps at US 20 and to the south at the Hawkeye Community College corner (Orange Road). Shaulis Road is between the two locations. IA 21 will then have four stoplights in its northernmost two miles, at every intersection it has in the Waterloo city limits, but still none on the rest of the route.