Same here and the IP address is not reachable.
Pinging tmc.openvehicles.com [54.243.136.230] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 54.243.136.230:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),