They're typically small businesses, what reason do they have to lie about business being down?

I'm sure they have the data, and I'm sure if a local government or journalist wanted to, they could look at tax records to see revenue impact

I don't think anyone would argue that such enhancements are a bad thing in the long run if 1) If the enhancements ultimately bring in more shoppers/customers, 2) there is still parking available in the area, and 3) the businesses can survive 6-12 months of reduced revenues

My response was really directed at comments implying that the businesses are essentially whining. There's a very real impact during construction, and certain businesses could be hurt by reduced parking, particularly in the states where the car is king