There was much back and forth over whether Kvish 1 would be closed overnight in both directions.
Confirmation was just announced from Mr. Rosenzweig the spokesman for the Council of Mevasseret Tzion:
Thursday, 19/1/2017 22:00 until Friday 20/01/2017 10:00 work will be done on Route 1 as part of the opening of the Harel Tunnels. Traveling from Jerusalem to Tel Aviv will be blocked between Genot Sakharov and Chemed exchange.
Traveling from Tel Aviv to Jerusalem will be blocked from Shaar Hgain until Genot Sakharov.