This way is long but it works:
angular.element(document.querySelector('[ng-controller="add"]')).scope().streetName
More readable:
var dom_el = document.querySelector('[ng-controller="add"]');
var ng_el = angular.element(dom_el);
var ng_el_scope = ng_el.scope();
var street_name = ng_el_scope.streetName;
And it’s much shorter if you’re using jQuery:
var street_name = $('[ng-controller="add"]').scope().streetName;
Link to jsfiddle demo