Impact Fee Map
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Depends on state and local authority

Road or traffic impact fee

A charge based on projected vehicle trips generated by the project, benchmarked against trip generation tables.

Who charges it

The city, county or a transportation district

The trap

Trip generation rates are averages. If your use genuinely generates fewer trips, an independent study is often allowed and often cheaper than the fee.

Road fees are the most common impact fee in the country and the most likely to be the only one a state authorizes. Illinois and Pennsylvania authorize transportation fees and essentially nothing else.

Fees are usually derived from standard trip generation rates by land use. Where your project genuinely generates fewer trips, an independent traffic study is often permitted and can pay for itself on anything larger than a single house.

California requires local governments to account for the lower trip generation of transit-oriented development unless they make a specific finding otherwise. Texas caps transportation service areas at six miles, and Nevada bars a single jurisdiction-wide service area except in the smallest communities.

Where this is authorized

Among the states with a general enabling act, 28 list this facility type as eligible and 1 do not. States without an act are a local question entirely.

Listed as eligible

ArizonaArkansasCaliforniaColoradoFloridaGeorgiaHawaiiIdahoIllinoisIndianaMaineMontanaNevadaNew HampshireNew JerseyNew MexicoOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsin

Not on the eligible list

Delaware

Next

Get the actual numberSix steps from parcel record to a written estimate. Check your stateWhat is authorized where you are building. Credits and offsetsWhere this fee can legally come down.
Read this before you rely on anything here. Impact Fee Map describes who is legally allowed to charge new construction, for what, and what a fee payer's rights are under state law. It does not publish fee amounts for any city, county or district, and it never will, because no source keeps thirty-nine thousand local schedules current and a stale number is worse than none. This is not legal advice, not a fee quote and not a substitute for the adopted fee schedule of the bodies with jurisdiction over your parcel. Statutes change; verify against the current text and confirm every figure in writing with the agency that will bill you.