Signal box for IR sensor

A signal box to sit near the tracks and hide a sensor to trigger a grade crossing flasher using an Arduino program. I Remixed this from an HO signal box. Imported into Tinkercad at 54% for N scale. Then I adjusted X and Y to fit an IR sensor and provided a hole for the detector lens. You must bend the IR and detector 90° from the board. The majority of the detector board gets buried in the layout base, in my case foam. The Arduino code and all the parts are shown in this video, https://youtu.be/-kqAZqe-W4A