The intersection of Martin and Broadway streets will be replaced with a traffic roundabout over the next few months. Meanwhile, beginning Oct. 7, Martin Street will be closed to traffic. Broadway traffic will be rerouted onto a two-way detour. - The intersection of Martin and Broadway streets will be replaced with a traffic roundabout over the next few months. Meanwhile, beginning Oct. 7, Martin Street will be closed to traffic. Broadway traffic will be rerouted onto a two-way detour.