I've been living in Turkey for 25 years and still drive on my US license. Lately when the jandarme pull me over for routine checks, they tsk-tsk that I have not gotten a Turkish license yet, and one said that I had to. When I asked the traffic policeman who pulled me over outside of Beşiktaş because my husband's firm was late paying its taxes and my plates showed up on his on-motorcycle computer, I asked and he said there was no need.