This is a repurposing of a famous flag of defiance flown by Texans as part of the Texas revolution against Mexico.

https://en.m.wikipedia.org/wiki/ComeMexico.https

The poster has redesigned the sign to say that their local government can come and take their bicycles and bicycle infrastructure. This this is a meme for bicycle infrastructure using a language that is easily recognized by people who would be anti-bicycle. This is part of a series of memeworks this poster has shared twisting generally reactionary talking points to "trick" or persuade would be reactionaries to being pro anti-car.