Xeque Agreed. It would be easier to move the threshold back than get rid of solidified lava from an
active volcano.
At the risk of sounding crazy, they might be better off pouring a new tarmac over this, along the lines of runaway emergency exits for 18-wheelers suffering from brake failure going down long steep inclines. Anything other than those boulders welded in place...
In Hawaii, they abandon the road (or village) when a lava flow visits.
Volcano National Park:
The road:
The road sign:
