This is the Old Summer Road, which at one time was the shortcut (via Tomtor) between Kyubeme and Kadykchan, neither place even exists now, but at least Kyubeme had a fuel station. In Kadykchan there is nothing but ghosts.
The Old Summer Road is no longer maintained, and deteriorates every year. At present it is only possible in August or early September, due to water levels on river crossings. (unless you hire a Ural truck or two to follow you the whole way - possible but expensive)
We took a look and rode 5km down the old road, but it was getting dark (it was 10:30pm), and we had to get to a town to eat n sleep (Susuman is 85km away). Here is Tony arriving back at the junction with the Susuman - Ust Nera road: