Should I Shoot in Black and White or Color for Travel Street Photography?

Before you travel to a new city for photography, how do you know whether to shoot color or black and white? My practical ideas:

Decide while you’re there

For example when I went to Mexico City, I initially started in monochrome, then later got into color.

Why? Even though I enjoyed shooting monochrome in Mexico City, I realized that Mexico City was so beautiful in color.