The officers of a town fair association may regulate and prevent theatrical, circus, or mountebank exhibitions and shows, or traffic in fruits, goods, wares, and merchandise of whatever description, the trading of horses, and games of chance, on fair days, within a distance of 200 yards in any highway leading to or passing a fairground, if in the opinion of such officers the same would obstruct or interfere with the free and uninterrupted use of such highways. The police employed by such association shall have the same power in respect to such matters on such highways as they have within such grounds.