This company could prove essential to the proliferation of self-driving cars on our streets. Autonomous vehicles are getting easier to find on the streets in several major cities in the United States. As a handful of companies are testing their self-driving cars in select cities, Alphabet's (GOOG -4.89%) (GOOGL -4.83%) Waymo has pulled ahead of the pack with a commercial service. The company said it completed 200,000 rides per week as of February, doubling in just six months. Tesla (TSLA -3.42%) could be ne ...