When is it legal for a driver or passenger to consume cannabis products in a vehicle?

It is illegal for a driver or passenger to consume cannabis products in a vehicle at any time, regardless of whether the vehicle is parked or whether the person consuming is the driver. This law is in place to ensure safety on the roads and to prevent any impairment that could lead to dangerous driving situations.

While some might think that it could be permissible in certain circumstances—like if a vehicle is stationary or during long trips—such beliefs are incorrect. California law treats cannabis consumption in vehicles similarly to alcohol consumption. Having an open container of alcohol or consuming alcohol while driving is also not allowed, highlighting the importance of maintaining clear legal boundaries around substance use in vehicles.

Thus, the legal framework consistently prohibits the use of cannabis products in any vehicle to promote safety for all road users.