@MafogMachine
Entirely agree and I'd leave it alone, but if Curlingman13 wants to remove the portion directly under the freeway, he's not wrong that newer construction occupies the space.

@CurlingMan13
The USGS data doesn't show the disused canal directly under the road, but it very much shows that the feature exists very near the road (screenshot from JOSM below).  This data is actually quite incredible.  There is rail line that was abandon in the 1840s in a forest in my hometown, which is very difficult to find in person, but easy to see many portions in this dataset.

http://dentremont.us/pub/Screenshot_20230713_212706.png