Expect delays in the Wawona Tunnel as work crews complete safety improvements. Starting this Sunday night, October 13, thru traffic should expect 30-minute delays between 8:00 pm and 10:00 pm, 2-hour traffic delays between 10:00 pm and 6:00 am, and 15-minute delays between 6:00 am and 8:00 pm. The delays will include single lane traffic control with pilot car operations escorting traffic thru the construction zone. Also, at the South Entrance, Yosemite thru-travelers should expect intermittent delays of up to 15 minutes with either a flagger and/or pilot car.