“Orange tape nailed to pavement with orange triangle and sometimes a number”
Surveyors control point. Surveyors will typically establish several control points just outside of the proposed work area that are a fixed location that will not likely change during construction. These points are usually GPS located and have a fixed elevation. It’s a way for the construction crews to have a way to verify that what they are building is located in the correct place and built to the right height.
No, it doesn't look like it's inside with the nail polish.
It's white and gold, not blue and black
I see what you did there.