Bridge Constructor Portal

Bridge Constructor Portal is a game developed by ClockStone and published by Headup Games. It is a Portal-themed version of the Bridge Constructor game series. It was released for PC, Mac, Linux, iOS, and Android on December 20, 2017. There is no specific date, but it will be released on PlayStation 4, Xbox One, and the Nintendo Switch at some point in 2018.

Overview
Headup Games have released the following overview:

Bridge Constructor Series
The Bridge Constructor games are a series of puzzling games where you take the role of an appraised bridge engineer and architect. Your objective is to build bridges so vehicles can cross a gap safely.

As of December 2017, it is #1 on the app store.