Both Move On and Change.org have special sections where you can sign or start a petition, including those that involve local issues. Move On’s CT petition page is here, and its page for starting a petition is here. Change.org doesn’t let you choose the state, but you can search for Connecticut. Its page for starting a petition is here.
Move On puts its petition advice on a separate page (complete with a 23-minute audio on delivering one’s petition, the part that people sometimes fail to anticipate), while Change.org provides it where you answer the questions it asks in forming a petition. Both of their petition pages show some of the successes at least partially due to their petitions.