MoDOT explains unsafe grates on new construction on Olive

The St. Louis Post-Dispatch's Along for the Ride column covers the reason grates have been installed on some new construction in the St. Louis area:
The I-270/Olive Boulevard project was designed in the mid-1990s, back when bike-friendly grates were not required in state highway projects, said Don Wichern, assistant district engineer. Now MoDOT crews are going around the St. Louis area replacing the old ones with bike-friendly ones. The same will happen on Olive near I-270, before roadwork wraps up.
MoDOT has done the same thing on several KC-area construction projects--installed unsafe grates and then replaced them soon after with bike-safe models. In some cases the problem has simply been that the bike-safe grate was on order but took several months to arrive.