EVI-RoadTrip: Electric Vehicle Infrastructure for Road Trips Tool

EVI-RoadTrip logo

The EVI-RoadTrip tool offers high-resolution refueling network design and analysis to inform electric vehicle (EV) charging infrastructure development for road trips or long-distance travels.

EVI-RoadTrip helps infrastructure planners, analysts, and decision makers evaluate EV energy consumption and corresponding charging demands along the routes—between origin and destination. It considers the projected location and characteristics of charging stations, potential electric grid impacts, and required infrastructure improvements.

Strategically located charging stations for long-distance travel are critical to enabling the widespread adoption of EVs by allowing them to travel further beyond city or town boundaries. Sophisticated analysis and planning can identify the points (e.g., corridors) that may require increased availability of EV charging stations to support electrified road trips.

Road Trip Volume and Pattern


EV Energy Use and Charging Simulation


Station Design (Siting and Sizing)


Capacity Analysis


Refueling Infrastructure

Electric Grid

EVI-RoadTrip combines data from transportation, infrastructure, and grid analysis to answer key questions about long-distance travels.


EVI-RoadTrip simulates energy consumption and charging demands for long-distance travels based on high-resolution spatial and temporal analysis to answer these key questions for infrastructure development:

  • How many charging stations do we need?
  • Where do we need those charging stations?
  • What is the impact of charging load on the electric grid?

Examples of Spatial Resolution

Coordinates: origin, destination, trip simulation

30m by 30m: land use type

TAZ: traffic analysis zone, capacity analysis

State: statewide total number of stations

Nation: nationwide corridor charging

Examples of Temporal Resolution

Seconds: trip simulation, vehicular energy use

Minutes: charging time, detour to charging stations

Hours: intra-state road trip duration

Days: cross-country road trip duration

Years: infrastructure build-out, EV adoption

EVI-RoadTrip estimates routes, driving conditions, energy use, and charging demands for every minute of the trip. In addition, it identifies where and how many chargers will be needed throughout the journey. As a result, users can view and examine high-resolution load profiles for individual stations or an entire area of interest. EVI-RoadTrip also provides information for individual charging station location (longitude and latitude), type of facility (e.g., a gas station, hotel), station size (the number of chargers), and charger/plug composition.

EVI-RoadTrip helps electric grid operators and planners estimate how much demand they will need to accommodate throughout different areas in their utility territories. EVI-RoadTrip also helps local, regional, and national policymakers identify where and how many EV chargers to install to meet increasing power demands for electrified road trips.

Road Trip and Charging Simulation

A map of California with green dots simulating charging demands for electrified road trips.

Based on the spatial and temporal distribution of road trips, EVI-RoadTrip simulates individual trips and estimates charging demands along the routes (between origins and destinations).

Charging Infrastructure Network Design

A map of California with blue dots representing existing chargers and pink dots for projected charging needs.

Next, EVI-RoadTrip designs an on-route charging station network (location of stations, the number of plugs required, and power ratings).

Charging Infrastructure Gap Analysis

A map of California with a gradient overlay of the DCFC plug deficit.

Results from EVI-RoadTrip can inform where and how much of a gap exists in the existing charging infrastructure.

Substation-Level Electric Grid Capacity Analysis

A map of California with a gradient overlay of charging capacity deficit.

One of the outputs of EVI-RoadTrip, EV charging load profiles for individual vehicles and charging stations, allows users to evaluate the electric grid capacity deficit.


California Electric Vehicle Infrastructure for Long-Distance Travel: Direct Current Fast Charging Needs To Enable Interregional Long-Distance Travel for Electric Vehicles, California Energy Commission Report (2023)

Fast-Charging Infrastructure for Electrifying Road Trips to and From National Parks in the Western United States, NREL Technical Report (2023)

Electrifying Road Trips to and From National Parks in the Western United States, NREL Presentation (2022)

DC Fast Charging Infrastructure for Electrified Road Trips, NREL Presentation (2020)