Tesla claims to have launched a robotaxi service in Dallas and Houston over the weekend, but so far, online crowdsourcing tools indicate that very few cars are actually available. On Saturday, @TeslaRobotaxi posted a 14-second video of a Model Y vehicle driving without any human safety monitor in the front seats . Elon Musk re-posted the video, adding, “Try Tesla Robotaxi in Dallas & Houston!” But as of Sunday evening, the service appeared to be largely unavailable, according to Robotaxi