Hi Ted,
Unfortunately it isn’t possible to set up the two paths in this way at the moment as the whitelist in the /vehicles/{id} path would overwrite the settings in the query string. You could instead try using the URL Rewriting option in the Endpoint Designer to ensure that there is always a parameter present in the query string when a user attempts to access the /vehicles/{id} endpoint. Instructions on how to do this can be found in our documentation at this link.
Hope that helps. Let me know if you have any questions.
Kind regards,
Jess @ Tyk