The van was designed to carry nine people, and it wouldn’t have been possible for many of the people on board to use seatbelts, German news agency dpa reported.
Germany has seen large numbers of migrants arriving in recent months. The Austrian-registered van was travelling toward Munich at the time of the incident.
The A94 is known as a smuggling route and the site of the accident is about 50 kilometres from the border with Austria, through which many migrants transit en route to Germany.
“The inhuman behaviour of the smuggler, who was injured in the accident and wanted to evade being stopped by the federal police just to save his own skin, makes one speechless,” Bavaria’s top security official, state Interior Minister Joachim Herrmann, told dpa.
Herrmann’s conservative party belongs to Germany’s main opposition bloc, which has pressed the federal government to tighten border controls. He said Friday’s incident shows “how important it is to further strengthen immediate border controls in order to stop smugglers already at the border”.