This is a frequent jihadi tactic. The Islamic State (ISIS) issued this call in September 2014:
So O muwahhid, do not let this battle pass you by wherever you may be. You must strike the soldiers, patrons, and troops of the tawaghit. Strike their police, security, and intelligence members, as well as their treacherous agents. Destroy their beds. Embitter their lives for them and busy them with themselves. If you can kill a disbelieving American or European — especially the spiteful and filthy French — or an Australian, or a Canadian, or any other disbeliever from the disbelievers waging war, including the citizens of the countries that entered into a coalition against the Islamic State, then rely upon Allah, and kill him in any manner or way however it may be….If you are not able to find an IED or a bullet, then single out the disbelieving American, Frenchman, or any of their allies. Smash his head with a rock, or slaughter him with a knife, or run him over with your car, or throw him down from a high place, or choke him, or poison him….
“Man ‘Shouting Allahu Akbar’ Causes Motorway Accidents in Berlin in ‘Islamist Act’, Prosecutors Say,” Sputnik News, August 19, 2020:
Earlier in the day, authorities in Berlin stated that a city highway was shut down after a series of crashes the previous night that were all caused by one man.
German prosecutors on Wednesday described the incident in which a man caused a series of motorway accidents that left six people injured, as an “Islamist act”.
“Islamist motivation according to our current knowledge”, AFP reported, citing the prosecutors.
Meanwhile, local media outlets have described the perpetrator as a 30-year-old Iraqi who shouted “Allahu Akbar” when getting out of his car during the time of the incident.
The man then put a box on the roof of his car saying that it had explosives inside. Police, however, later said that the box only contained tools.
Three of the victims were injured severely in the incident, while traffic on one of Berlin’s main transport arteries was closed leading to long traffic jams.