Pretty sure its not just those two days…the dates depend on the direction. Northbound might be those two days, I believe southbound is at the beginning of the holiday. I think the signs change dependent on the direction of the on ramp to the hwy.
So based on the travel restrictions, they’re anticipating the traffic on Thursday and Friday won’t be too bad? Anyone hazard a guess there? Thinking of making a long day trip from Taipei to Hualien on Thursday (darn family stuff on Friday!!).