Hey per87,
Thank you for using the Apple Support Communities! We understand you're not seeing the car option under travel time in Calendar on your iPhone or Mac. Let's see how we can help out here.
To start, let us know which iPhone model and exact iOS version you're using. You can find this under Settings > General > About. This will help make sure we're looking in the correct settings with you, as some settings options change with iOS updates.
For now, let us know exactly where you are going to look for the travel time options for your event in Calendar. Are you opening Settings > Calendar and going into an option there? Or, are you opening your calendar event and finding the option from there?
When was the last time you seen the car option presented to you on your iPhone?
For reference: Create and edit events in Calendar on iPhone
Any other details you can share with us, will be helpful too. We look forward to hearing back from you.
Best regards.