Supercemento completes electrification on Quilmes-Berazategui section of Roca commuter network June 14, 2016 | Latin America News Argentina-based Supercemento S.A has completed electrification on the Quilmes to Berazategui section of the Roca commuter network in Buenos Aires. The entire Roca commuter route to La Plata is being e... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password