Public Improvement Districts (PID) have long been a possible tool for neighborhoods to fund improvement projects, but are not widely accepted by most communities because it coerces those without an interest in proposed projects to be obligated for additional taxes. These extra tax obligations can make an entire city become much less desireable for people moving into the area, thus most will prefer another city, all other things being equal. This can mean that when you get ready to sell your existing home, the market will be much softer and your selling price will likely be 2-3% lower or more. For most homeowners that difference in future sales value makes alternatives to a PID program much more reasonable.
Other alternatives include private neighborhood fund raising drives, coop programs available through most municipalites and others. All with the benefit of making the neighborhood more presentable without the encroachment of more taxation. It's a good idea to be aware of proposals to your council by parties wanting these. They're often tied to developers wanting to use tax revenues to help fund their projects risk free. Garland homeowners recently blocked the use of PIDs, but it is a never ending concern so keep an eye out in your community.