Roadworks sort of temporarily change the layout of your lane. So as long as you keep inside whatever goes for the current lane, you don't need to indicate. But

Roadworks sort of temporarily change the layout of your lane. So as long as you keep inside whatever goes for the current lane, you don't need to indicate. But otherwise you do, since you temporarily go out of your lane. It's not about the line itself, it's signalling the maneuver and crossing the lane's boundary that does it. Sure, the lane centering systems don't know that cones change how the lane goes. They also don't know much about temporary lanes painted in yellow (in my country road works do this) and that they override the usual white lanes. Needless to say, one needs to increase their attention when driving through such things anyway, so I turn LTA and adaptive cruise control off and slow down. A wild road worker may suddenly appear in my way at any moment.