In January 2010, RTC introduced the ACE branding for its bus rapid transit offerings. The first ACE route was the ACE Gold Line, connecting downtown Las Vegas, the Las Vegas Convention Center, the Strip, and the South Strip Transfer Terminal. In addition, ACExpress was introduced as branding for its express bus service, with an express bus line connecting the Centennial Hills neighborhood northwest of the city with downtown Las Vegas, the Center Strip, and UNLV. In May 2010, RTC rebranded its lines away from the "ACE" name due to a lawsuit from Ace Cab, a local Las Vegas taxi operator; ACE Gold became the Strip and Downtown Express (SDX); ACExpress became Centennial Express (CX), and ACE Green became the Boulder Highway Express (BHX)