No,you can't.
china
By using the Silk Road
The Royal road was constructed to aid in communication throughout the Persian empire from Sardis to Susa.
china
By using the Silk Road
road system
Road King was created in 1988.
The Royal Road was built by Darius to unite the sparse kingdoms he had conquered. The road was about 20ft. wide and stretched around 15,000 miles connecting North Africa and India and everything in between. There was an inn every few miles in which travelers could exchange their tired horses for fresh rested ones. There were also guards along the road making it the safest way to get across Persia.
road king is Carretera Rey king of the road is Rey de la carretera
Silk Road
They are in different Harley families, so no. With some parts, you can get a road king look, but you can't turn it into a road king. If you wanted a road king, you should have gotten one
From what I know there's the... Wind Road (Wind King with the Wind Regalia) Flame Road (Flame King with the Flame Regalia) Bloody Road (Fang King with the Fang Regalia) Sonia Road (Thorn King with the Thorn Regalia) Rising Road (Thunder King with the Thunder Regalia) Over Road (Rumble King with the Rumble Regalia) Gaia Road (Gem King with the Gem Regalia) Ring Road (Pledge King with the Pledge Regalia) Because Ikki failed to be the Sky King for the moment there's an additional road added to the 8. It's named the Hurricane Road with it's King as the Storm King and the regalia as the Storm Regalia.