Your citation is not to anything official. Also, it discusses exactly what I mentioned above: differing treatment. From what you quote:
"prohibits state and local governments from either excluding people from or denying the benefits of public services on the basis of disability" (emphasis added.) The 'civil right" is for the disabled and non-disabled to have equal access, hence things like curb cuts. No one group is being denied access. Just because you cannot drive due to a disability and thus have to walk or bike doesn't mean you are being discriminated against on the basis of a disability. Everyone who is not disabled is also being excluded.

The temporary conditions may be unsafe. They may be a P.I.T.A. But I don't believe they qualify as violations of the ADA.