Complex sentence: Monaca Bridge on the Rochester side, and the Monaca-Rochester Bridge on the Monaca side.Even to this day both of the towns law enforcements respond to incidents on the bridge, but whichever side the incident happend on decides which town takes charge of incident.
Split into simpler sentences: Monaca Bridge on the Rochester side, and the Monaca-Rochester Bridge on the Monaca side. Both towns' police departments respond to incidents on the bridge, with the incident location on the bridge deciding which town takes charge of incident.