street survey; on-street questionnaire
A survey or opinion poll conducted by approaching people on the street, often for market research or news reporting.
I answered a street survey in front of the station.
The TV station conducted an on-street opinion poll.
Compound of 街頭 (street, from 街 'town' + 頭 'head/top', here meaning 'on the street') and アンケート (from French 'enquête', meaning survey).