noun
priority zone; consideration zone
A designated area, often on public transport, where passengers are expected to give priority or show consideration to the elderly, disabled, pregnant women, and others in need.
電車の思いやりゾーンでは、席を必要としている人に譲りましょう。
In the train's priority zone, let's offer our seats to those who need them.
駅のホームに思いやりゾーンが設置されている。
A consideration zone has been set up on the station platform.
優先席 refers specifically to priority seats, while 思いやりゾーン is a broader area concept that may include standing space and encourages considerate behavior beyond just giving up a seat.
Compound of 思いやり (consideration, empathy) and ゾーン (zone, from English). A relatively modern term used in public transportation and public facilities.