Chinese autonomous driving tech company Pony AI (PONY 3.79%) motored well higher on the stock exchange Tuesday. Ramping up service hours and road testingWell before market open, Goldman Sachs prognosticator Allen Chang boosted his Pony AI price target by 13%. The latest developments announced by Pony AI are the key factors in the analyst's move, according to reports. Additionally, in certain markets where its service is live, Pony AI has expanded operating hours from 15 per day to a full 24. Self-driving successGiven these advancements in commercialization, Chang feels that Pony AI has more than a chance to increase its gross merchandise value (GMV) per robotaxi.