hey, it's quite hard to tell from the aerial imagery, but I suspect there's a pipe or culvert under the track. If that were the case, then this would be the most appropriate option to click: https://0x0.st/Xw_M.png - but note that it only appears if you select the stream, not the road

there's an example here: https://www.openstreetmap.org/edit#map=22/-40.7846937/175.0968324