I was in Ahungalla yesterday on a workshop. Went there by coach but returned with a friend who had driven down. He had been charged with speeding yesterday but had been unable to pay the fine since it was poya day.
This morning we tried looking for a post office to pay the fine, but being Sunday they were all closed. Faced with the prospect of returning another day to pay the fine and collect the license we decided to talk to the policemen at the police post at the the Expressway entrance, to see what could be done.
They were sympathetic and very helpful. They said we could probably get the postmistress at the agency post office to collect the fine. One of the policeman accompanied us and we drove to the agency post office, about 10 minutes away. It was a part of a shop and while the post office was closed the shop was not. The postmistress was not around but the policeman made inquiries and a message was sent to her. She turned up shortly afterwards and took the money and wrote the receipt for the fine.
We returned to the police post, handed over the receipt and collect the license. My friend offered the policeman who accompanied us some money for his assistance but it was refused.
All in all, a surprisingly good experience.
ps. The speed camera's are not automatic they are manually operated. They are usually stationed around the overhead bridges or where there is shade. They usually impose a fine only if the driver is above 125km or so.