In the never-ending quest for delivery immediacy, grocer Kroger is testing out 30-minute deliveries in its home market of Cincinnati, cutting the promised time from Amazon’s Prime Now in half, according to the Cincinnati Business Courier. Called Kroger Rush, the service costs $5.95 per order, with the first order free, and requires an app download. It’s available to customers within a three-mile radius of stores in Oakley, OH and Newport, KY. Items available include ready-to-eat and ready-to-heat meals, produce, beverages, meat, dairy, bakery and pantry products.

Argo AI, a Pittsburgh-based artificial intelligence and autonomous vehicle tech company, is investing $15 million to establish a Center for Autonomous Vehicle Research at Carnegie Mellon University to improve self-driving technology. The grant is for five years. The Autonomous Vehicle Research center will focus on improving sensors’ perception and algorithms designed to improve safety and reliability in a range of conditions including winter weather, especially snow, and construction zones.

May Mobility is expected to launch four autonomous shuttles in downtown Grand Rapids by late July. The Ann Arbor-based startup will roll out the six-seat vehicles on a 3.2-mile downtown bus route in the city. The one-year pilot program was announced in September. The shuttles are already being tested in anticipation of the formal launch, according to a Facebook post from the city. The program will cost $650,000, MLive reported Thursday. Crain’s previously reported that the city of Grand Rapids is contributing $250,000. A public-private partnership of nine Michigan-based companies called the Grand Rapids Autonomous Mobility Initiative is also supporting the program.

Two popular Porsche models have been recalled to fix transmission bushings that could degrade, increasing the risk of the vehicle rolling away while in park. In the meantime, Porsche is telling vehicle owners to use their cars’ parking brakes. The recall will begin Aug. 11, according to documents released last week by the NHTSA. Both the Porsche Cayenne SUV and the Panamera hatchback sedan are the subject vehicles. The NHTSA didn’t provide breakdowns for how many of each model are affected, but total, the recall covers 99,665 vehicles. The recall also spans over a decade of cars.

Federal research shows that marijuana consumers believe they drive better when they’re high, a leader of the National Highway Traffic Safety Administration (NHTSA) said during a congressional hearing last week. Appearing before the Senate Commerce, Science and Transportation Committee, NHTSA Deputy Administrator Heidi King testified that the department is combating impaired driving from cannabis, opioids and other drugs by issuing grants for law enforcement training and expanding public education campaigns on the issue. Part of the reason public education is particularly necessary, she said, is because “most users of marijuana who have participated in market research we have developed are saying they believe they drive safer when they’re high because they’re very focused and they’re being very cautious.”