Many states have constitutional limitations on how transportation funding can be used. This is often motivated by a concern that revenues from fuel taxes will not be used for transportation investments. In some cases, the type of transportation investments allowed are limited to personal motor vehicle infrastructure.
“Constitutional Transportation Funding Limitations” may or may not mean those limitations do not allow bicycle or pedestrian infrastructure to be funded by a state gas tax. For example, Kansas allows counties, cities, and townships to direct up to 10% of their gas tax funds to footpaths and bicycle paths.