Since May, the number of weekly paid robotaxi trips for Waymo has increased to 100,000.

• Waymo, owned by Alphabet, revealed on Tuesday that it offers over 100,000 paid rides per week to users in the U.S., which is double the number it announced in May.
• In July, Alphabet declared that it planned to invest an additional $5 billion in its autonomous vehicle project.
• Geely Zeekr electric vehicles will be equipped with Waymo's "generation 6" system as the company aims to expand its service beyond the Sun Belt states.

Waymo's co-CEO Tekedra Mawakana announced on LinkedIn that the company is now providing over 100,000 paid robotaxi rides per week in the US, which is double the 50,000 weekly paid trips reported in May.

On Tuesday, a spokesperson for Waymo's driverless vehicle venture informed CNBC that San Francisco has the highest number of trips among the cities where Waymo provides its commercial service, which also includes Phoenix, Austin, and Los Angeles.

In 2009, Alphabet launched Waymo as a self-driving project and recently announced an additional $5 billion investment into the project.

Waymo unveiled information about its latest "generation 6" self-driving technology, allowing the company to provide driverless services in a broader range of weather conditions and with fewer expensive cameras and sensors in its vehicles.

Waymo, with approximately 700 vehicles in its fleet, is the only U.S. company offering a commercial robotaxi service, Waymo One.

Waymo has expanded its autonomous ride-hailing service in Phoenix to 90 square miles, making it the largest territory of its kind in the US. Previously, Waymo partnered with Uber in the city to bring its service to Uber's existing users.

Waymo has extended its San Francisco robotaxi service to three new California locations - Daly City, Broadmoor, and Colma - and is currently testing its driverless vehicles on freeways in the San Francisco metro area.

Waymo claims that its Waymo Driver was 3.5 times better in avoiding crashes that caused injuries and 3 times better in avoiding police-reported crashes than human drivers. However, CNBC could not independently verify the company's safety claims.

Despite the availability of commercial robotaxi services from Didi and Pony.ai in China, Waymo faces limited competition domestically. Cruise, a Waymo-owned company, experienced setbacks that temporarily removed its driverless vehicles from the road. Additionally, Uber and Ford have ceased their efforts to develop robotaxis.

Tesla, Elon Musk's electric vehicle manufacturer, has been promising to turn customers' existing vehicles into driverless cars through a software update for years. However, the company has not yet produced a car capable of functioning as a robotaxi. Tesla plans to reveal its CyberCab, or dedicated robotaxi, at an eagerly-awaited event on October 10.