ʻaʻā roads

[NE2]

Any other examples?

[webfil]

[Pete from Boston]

MUTCD spec is pāhoehoe.

[oscar]

And the lava flow in NE2's photo seems to be more pahoehoe (smooth) lava than a'a (jagged) lava.

"A'a" is the sound people make when they fall on it, since its jagged edges will quickly slice up your skin.  It has a similar effect on rubber tires, making it a completely unsuitable road surface (and it's also no fun having it in clear recovery areas, as with some minor roads on Hawaii's Big Island).  But pahoehoe isn't real safe either.  Walking on it sounds like a thin layer of glass is breaking under your feet, and I susoect the resulting small sharp fragments would work their way into and ultimately damage tire treads.

[allniter89]

Any other examples?

That is what it must of looked like when dinosaurs took a shit 

[jeffandnicole]

We're talking about asphalt, reflectors and faded striping here, right?

[oscar]

Mods, since this thread has drifted a lot from NE2's original "a'a roads" pun, I suggest splitting off discussion of the latest lava flows' threat to Pahoa and HI 130 to a new "Lava flows threatening Pahoa and HI 130" thread in Pacific Southwest.  I could just move my own posts there, but I can't do that with discussion by other users.

EDIT: New thread at https://www.aaroads.com/forum/index.php?topic=13906.msg2016349#msg2016349 . -Z