If you a) support the congestion charges we now have in Stockholm, and b) think that only people in Stockholm city (and not in the whole region) should vote in the referendum that will decide whether we will keep the charges, you must read this article
(PC Jersild in Dagens Nyheter).
The article will give you another good argument in all forthcoming discussions about these charges that we most naturally should keep. My own favorite arguments? It is good for the environment, and it makes Stockholm a little bit more like London….