Location: US-421 and SR 394, Sullivan Cty Reassurance shield after 394 as we head out of Bristol. Location: US-421 and SR 44, Sullivan Cty About a mile later, we’ll approach SR 44. Location: US-421 and SR 44, Sullivan Cty Turn right ahead for SR 44 south. 44 north joins US-421. Location: US-421 and SR 44, … Continue reading U.S. Route 421, TN-394/TN-435 to TN-44