The Monon Trail was closed near Carmel Drive for a long, long time. I didn’t know what was going on until a few weeks ago. What a pleasant surprise! They’ve build a huge up-and-over bridge, so you don’t have to deal with cars at all. The trail crossing at Carmel Dr. was always hard for cyclists. It’s a wide street: too wide to walk your bike. If you want to get off the Monon Trail, and divert onto Carmel Drive, you’ll need to ride down the little ‘off-ramps’, which aren’t complete as of this writing.