Yes, Wednesday morning there will be many traffic changes, with 150 big yellow limousines plying the roads, speeds will be cut to 20 mph up to four times a day in the area of Dublin's 20 school buildings. Yes, school begins! Maybe allow yourselves a few extra minutes to drive to work, and be extra vigilant for kids running to catch a bus or cycling to beat the bell, and for traffic police watching after everyone. And that gentle whoosh sound? Maybe the collective sighs of the parents of the 16,500 students in our fine school system? Be extra vigilant tomorrow, extra safe, as we all adjust to the new reality.