Yeah, good point. Embankments. Yikes.
Was a back seat cage passenger late last night on a 3+ hr drive back from Kelowna to Abbotsford along the Coquihalla, and we hit a long stretch of sand-on-road* on a tight downhill corner over a very long cliff just above Merritt. It was suddenly touch & go whether we'd take a very extreme (and fatal) short cut! Thankful we kept traction. If riding it would have almost certainly been all over.
*Crack sealing, with signage but much more dangerous than I think is prudent by the construction folks.