Most cell sites in Connecticut are co-located. Collocation is dictated by the CT Siting Council. The CT Siting Council has the final say as to where cell sites may be located throughout in the state. Basically, if there is an existing structure available for leasing in a location a cell carrier needs to expand their coverage and it meets their structural needs, that carrier must use it as opposed to proposing a new structure. Cell phone providers, e.g Verizon, AT&T and TMobile, propose new antenna sites to help to increase the reliability of their cell phone coverage.
As an estimate of coverage for reliable service, Darian scores about 70 percent while New Canaan scores about 25 percent. Wilton scores about 45 percent. Darien does have more existing cell antenna structures than New Canaan. They include water tanks, church steeples and stand alone towers. Darien has not had to rely on new cell antenna structures as much as New Canaan has and will if we want better service. Darien's topography is mostly flat while New Canaan's has many ridges and valleys. Other than 's water tanks, New Canaan doesn't have any tall structures in areas where coverage needs to be improved.
Hence, this is why cell phone carriers will have to construct new antenna structures in New Canaan to help to achieve the goal of improved cell phone reliability. Our weak cell phone coverage does raise safety questions, especially when we know that some 911 emergency calls are not completed.