6 Sections 45 minutes Author: Shared-Use Mobility Center
This Learning Module on the Importance of Shared, Electric Mobility is part of a collaboration between SUMC and the Hewlett Foundation that aims to explore a broad array of electric and shared mobility pilot projects across the US and to build greater understanding of these innovative projects across various disciplines.
A transition to electric mobility offers immediate impacts to public health, moving the mobile source pollution emitted from ICE vehicles away from population centers to distant power plants where energy is generated and point source pollution is better contained.
Shared mobility has seen tremendous growth in the last decade due to technological advances in smartphones and digital infrastructure. The relatively low cost of charging and maintenance compared to ICE vehicles helps bring down the total cost of ownership as shared vehicles are driven more, and widespread use of shared mobility can help create the economies of scale necessary to bring down the cost of batteries.
Many of these policies involve funding opportunities for EV infrastructure projects, regulations for manufacturers, and incentives to promote EV production and use as a means to improve public health and reduce transportation emissions.
Transportation is now the greatest direct source of greenhouse gas (GHG) emissions in the US. While the repercussions of climate change may seem distant, the internal combustion engines (ICE) in vehicles pose serious public health issues, emitting nitrous oxides and particulate matter linked to asthma and cancer. For the sake of both the environment and social equity, transportation must evolve. In its comprehensive 2014 report, Climate Change 2014: Mitigation of Climate Change the Intergovernmental Panel on Climate Change deconstructs direct transportation GHG emissions into four variables, historically known as the ASIF model, referring to activity, mode share, energy intensity, and carbon cost of fuels:
The sum of all the attributes of a vehicle trip (F, I and A) multiplied by the average distance traveled per person (S) represent a mitigation equation to measure progress towards curbing harmful pollution from transportation.
Electric mobility is concerned with technological change around the latter variables, fuel and energy intensity. Electrification of transportation has skyrocketed, globally, from fewer than a quarter-million vehicles in 2013 to over 4 million in 2019. The recent, and now exponential, growth of electric mobility is enabled by improvements in battery chemistry and the maturation of large-scale battery production in China and Europe. Per kilowatt (kW), the unit of storage in batteries, the cost in 2020 was less than 10% of what it was in 2010, according to the International Energy Agency’s 2019 Global EV Outlook. The result has been a rapid growth of models available from original equipment manufacturers (OEMs) and commitments to move towards fully electric fleets.
This transition to electric mobility offers immediate impacts to public health, moving the mobile source pollution emitted from ICE vehicles away from population centers to distant power plants where energy is generated and point source pollution is better contained.
However, electricity in the US comes from a patchwork of regional grids powered by a mix of renewable (e.g. wind and solar) and non-renewable (e.g. coal, natural gas, oil) sources. The degree that electric vehicles impact the environment, and the mitigation equation, hinges on how much each grid relies on carbon-intensive, non-renewable sources. The large-scale infrastructure shift to cleaner energy sources represents the long-term imperative for halting
There are a variety of EV types on the market. Battery Electric Vehicles (BEVs) use electric motors which run solely with battery power, and thus have zero tailpipe emissions. These vehicles do not have internal combustion engines (ICEs) and are fully charged by external power sources connecting to the power grid, such as a wall socket or charging station (see the “EV Charging Types” section in this Learning Module for more information on types of charging stations). Because BEVs do not have ICEs, they can have large batteries capable of long ranges, currently as high as 500 miles. As electricity generation shifts to more sustainable and cleaner sources, BEVs become more and more environmentally friendly.
Fuel Cell Electric Vehicles (FCEVs) are also fully electric vehicles, but they produce the electricity using a fuel cell powered by hydrogen. Rather than plugging the vehicle into an electricity supply to recharge the battery, a FCEV uses a supply of hydrogen which mixes with oxygen from the air to produce electricity. The hydrogen needs to be refilled like with gas-powered vehicles, but the only waste product from this reaction is water vapor.
Additionally, there are several types of Hybrid Electric Vehicles (HEVs), which operate primarily on gasoline, but use electricity to improve fuel efficiency and vehicle performance. Generally, HEVs have both an ICE as well as an electric motor. The ICE burns gasoline for energy, while the electric motor gets its power from energy stored in the battery. In most HEVs, the battery gets energy through regenerative braking; when the driver brakes, the electric motor operates as a generator and converts the vehicle’s kinetic energy into electrical energy, which is then stored in the battery. This energy is then applied to the vehicle in various ways with varying efficiency. The energy from regenerative braking can be used at the same time as the ICE to boost vehicle performance, or to power the vehicle at low speeds for very short distances. There are also Fuel Cell HEVs, which work much like traditional HEVs, but are primarily hydrogen-powered rather than gas-powered.
Plug-in Hybrid Electric Vehicles (PHEVs) also have both an ICE and electric motor, but have larger battery packs than traditional HEVs and can be charged externally through a charging station or outlet. PHEVs can operate for longer distances than traditional HEVs using the electric motor – up to about 25 miles – though still not as long as fully electric vehicles.
Just like engines that run on gas, PEVs have their own set of technical terminology. Electric Vehicle Supply Equipment (EVSE) is the industry term for charging stations and charging appliances. When discussing EVSE, it is important to talk about how electricity works and where it comes from. The US Department of Energy maintains a helpful guide. A common analogy in electrical engineering relates batteries to a wheel powered by water from a hose.
In the US, 78% of power production comes from the private sector, about evenly split between several hundred large, investor-owned utilities (IOUs) and several thousand small independent producers. The other 22% comes from the public sector, with 7% coming from nine federal facilities and about 15% from mid-sized, publicly-owned utilities (POUs) run at the municipal or regional level. Transmission grids (often just ‘the grid’) refer to the high-voltage transformers and power lines that deliver electricity across regions to low-voltage, local distribution networks connected to outlets or transformers.
Electronic devices draw Alternating Current (AC) power, which is then converted to Direct Current (DC) power, the kind stored by batteries. As clearly defined by the EVSE provider EVgo, AC Level 1 charging requires only a plug and a conventional 120V outlet and can deliver 1.9 kilowatts (kW), or about four miles of range per hour of charging. This is what would be most appropriate for small batteries, like those used on bikes or scooters. AC Level 2 charging requires a 240V power source, like those used for heavy appliances, and can deliver up to 19.2 kW from a specialized charging station, offering up to 20 miles per hour spent charging. AC Level 3 charging, which is still under development, would allow for up to 43 kW. All AC charging uses a standard plug, SAE J-1772, to draw power.
Credit: ChargePoint. EV Charging Plugin Types
With DC Fast Charging, the AC to DC conversion happens in the station instead of the vehicle. These specialized stations can draw up to 480 volts that can be fed directly and quickly to the battery on board the vehicle. Due to the smaller size of batteries in many PHEVs, not all PEVs can use DC Fast Charging equipment. While a DC Fast Charger can deliver between 50 and 350 kW, or 90 range miles in 30 minutes, only certain brands of BEVs are capable of taking advantage of this higher-output charging, with 350 kW being the maximum for heavy-duty vehicles (HDVs) like buses and 150 kW for LDVs. [i] DC Fast Charging uses a variety of plugs depending on the vehicle manufacturer. The Combined Charging System, sometimes called “combo chargers” are used for American and European BEVs, while CHAdeMO is used for Japanese brands and Tesla Superchargers for its own network.[ii] Since 2013, Tesla has offered drivers an adapter that can convert CHAdeMO fast charging or AC J1772 connectors to its vehicles.
Whatever the type, there is a strong need for publicly accessible EVSE. The ICCT estimates that among the 100 largest metropolitan areas, all but 12 are predicted to face charging shortages unless AC Level 2 charging at workplaces increases by 7 times and destination charging by 3 times. [iii] Due to the slower charging rate, the relationship between the number of PEVs on the road and Level 2 ports is much more closely tied and many more Level 2 stations are needed than Fast Chargers. However, cities must still establish a baseline density of Fast Chargers. The National Renewable Energy Laboratory suggests one public Level 2 for approximately every 29 PHEVs and one Fast Charging point for every 588 BEVs.
Shared modes that best complement Level 2 charging are those with several hours of inactivity at a time, such as ridepools or carsharing, that can be located at park-and-rides, workplaces, residential developments, or on-street parking with low turnover. For shared mobility services with high turnover, such as rides-on demand and certain carsharing models, Fast Charging helps minimize lost revenue spent charging. [vi] Pilot programs like Maven Gig and Lyft Express, which allow drivers to rent PEVs by the week from dealers and receive complimentary charging, show that Fast Charging is likely critical to wider adoption among drivers. [vi]
For transit using MDVs and HDVs, on-route charging can supplement overnight charging at storage depots and minimize service disruptions during the day. Because of the high cost of installation relative to the unit itself, it can be more cost-effective to cluster different forms of Fast Charging together even when supplying different modes. [vii]
Because of the applicability across EV modes and the relatively low cost of installation and operation, AC charging can be built out in greater volumes and is appealing to a wider group of stakeholders. When left to the market, Fast Charging deployment has largely been led by OEMs to support vehicle sales. The largest deployments of Fast Charging have come as a result of public spending programs or as restitution, the most notable being a 2016 settlement with Volkswagen that directs $2 billion dollars of investment in EVSE installation and another $2.7 billion in PEV grant funding to states.[viii] Attaining a baseline coverage away from highly utilized traffic corridors or commercial destinations will likely require similar public support.
Because of the applicability across EV modes and the relatively low cost of installation and operation, AC charging can be built out in greater volumes and is appealing to a wider group of stakeholders. When left to the market, Fast Charging deployment has largely been led by OEMs to support vehicle sales. The largest deployments of Fast Charging have come as a result of public spending programs or as restitution, the most notable being a 2016 settlement with Volkswagen that directs $2 billion dollars of investment in EVSE installation and another $2.7 billion in PEV grant funding to states.[viii] Attaining a baseline coverage away from highly utilized traffic corridors or commercial destinations will likely require similar public support.
The US Department of Energy’s Office for Energy Efficiency and Renewable Energy (EERE) offers a guide for programs that can be applied towards EVSE and electric mobility. [i] Within the EERE is:
In the US Department of Transportation, the Federal Transit Administration (FTA) supports capital expenses for “regular, continuing, shared-ride surface transportation services.” When designed to support public transit, many programs can be directed to capital expenses related to shared mobility service:
In addition to the FTA, the Federal Highway Administration (FHWA) offers several funding opportunities for projects affiliated with the National Highway System:
In late 2021, the passing of the Infrastructure Investment and Jobs Act (IIJA), also known as the Bipartisan Infrastructure Law, marked an unprecedented investment in vehicle electrification. Through the IIJA, $550 billion total has been allocated to new infrastructure investments, more than $50 billion of which can be applied to electric vehicles and related infrastructure. This funding includes:
$10.5 billion for grid and battery-related improvements. This money is allocated to programs enhancing electric grid and vehicle-to-grid technologies, carbon reduction strategies, working groups to study and report on barriers to EV adoption and implementation, and other initiatives.
Elected or appointed legislative committees and state departments of transportation oversee key regulations and mandates relating to transit, motor vehicles and energy markets–or explicitly delegate that authority to regional and local units of government. Public utility commissions, which oversee the regulatory environment for utilities and electric vehicle charging, are increasingly important state entities. As managers of the public right-of-way and public transit operators, federal and state funding sources shared and electric mobility services are most often directed through regional and local entities, ranging from regional planning organizations, councils of governments, and metropolitan planning organizations at the regional level to counties and cities at the local level. These entities have generally led regulation, funding and operations of shared and electric mobility services and the integration of these services into land use planning. [ii]
The National Association of State Energy Officials identifies several general goals behind state and local policies that promote PEVs as a means to improve public health and reduce transportation emissions.[iii] Public investments and regulations are generally designed to either raise public awareness, encourage individual or fleet use, or improve market conditions in the short and long terms. The following are examples of policies supporting all forms of shared and electric mobility in California, which has led the nation in planning for electrification of transportation.
In 1990, the California legislature passed a mandate requiring that vehicle original equipment manufacturers (OEMs) produce PHEVs, BEVs or FCEVs in proportion to a fraction of their vehicle sales in the state. As the largest auto market in the country, the ZEV mandate is credited with jumpstarting the modern PEV market and prompting other states—Connecticut, Maine, Maryland, Oregon, New Jersey, New York Rhode Island and Vermont to adopt the same standard.
Years later in 2006, the California legislature passed the nation’s first GHG emissions cap-and-trade program, creating a market-based framework to reduce emissions from heavy-polluting industries. Among other measures, Assembly Bill 32 authorized the California Air Resources Board (CARB) to oversee emission reduction targets in transportation. In 2012, Senate Bill 535 directed CARB to invest cap-and-trade revenues for shared and electric mobility services in pollution-burdened and low-income communities. That year, Governor Jerry Brown issued Executive Order B-16-2012 and set a statewide goal that 1.5 million of vehicles on the road be powered by the electricity of fuel cells.
In 2015, Senate Bill 350 set a target to transition half of all electricity use in the state to renewable sources by 2030. Among other measures, SB 350 directed the California Public Utilities Commission (CPUC) and the California Energy Commission to assist IOUs in creating integrated resource plans or strategies to reduce GHG emissions associated with their power generation. To prevent energy monopolies, states place limitations on the degree that power generators—utilities—can own power supply infrastructure, including EVSE. The CPUC has used SB 350 as a means to relax or introduce regulations to change this, allowing IOUs to directly invest in EVSE and for POUs to direct revenue to public charging through a strategy called rate-basing. On the power demand side, CPUC has encouraged plans for ‘managed charging’ that would alter the cost of electricity according to ‘time of use’. Doing so would incentivize charging during periods when renewable electricity is often generated, during the day, and reduce demand during the evenings. Utilities can also direct revenue to rebate programs for developers that build EVSE or build out ‘make-ready’ spaces wired with the electrical infrastructure to potentially support charging in the future.
In 2022, CARB allocated $2.61 billion dollars to support clean transportation and further the transition to zero emission mobility in the 2022-2023 fiscal year.[iv]
To promote social equity in the transition to renewable energy and guide cap-and-trade funding from SB 535, CARB released Low-Income Barriers Study, Part B: Overcoming Barriers to Clean Transportation Access for Low-Income Residents in 2015. The report helped establish grant funding for shared and electric mobility services, including:
Blue LA is a public, all-electric carsharing service led by the Los Angeles Department of Transportation and the City of Los Angeles and the mobility operator BlueSystems. BlueLA partnered with several community-based organizations—the Koreatown Immigrant Workers Alliance, the Salvadoran American Leadership and Educational Fund (SALEF), and TRUST South LA—to form a steering committee to help guide the pilot design and community outreach. At 100 electric car-sharing vehicles across 110 Level 2 charging stations, the program will help transform clean mobility in downtown L.A. [v]
Green Raiteros offers free, all-electric rides on-demand to Fresno from the agricultural families in the rural Central Valley of California. The Latino Environmental Advancement and Policy (LEAP) Institute led outreach and marketing, and management of day-to-day operations such as driver recruitment and ride scheduling. The program uses two Chevy Bolts and a BMW i3. EVgo and Electrify America sponsored 22 public Level 2 chargers for the program, split between LEAP’s community center and three apartment complexes.[vi]
Our Community CarShare is a free carsharing service offered to residents of three affordable housing sites in Sacramento. The city bought a fleet of eight vehicles, installed Level 2 charging at dedicated spaces at Mutual Housing apartments, and integrated service with Zipcar. Community Carshare was able to leverage the expertise of Zipcar and maximize its impact by providing users consistent access to vehicles and charging equipment. Sacramento has since launched an aggressive zero-emissions vehicle (ZEV) campaign to expand electric transit and shared mobility. [vii]
The Little Roady autonomous shuttle is dubbed the longest free transportation route in the country. The electric autonomous pilot launched in May 2019 in Providence, Rhode Island. The service uses 6-passenger electric vehicles operating autonomously on a continuous 5.3-mile loop between Providence Station and Olneyville Square.
CARB has since started the Clean Mobility Options (CMO) Vouchers for Disadvantaged Communities program, which is directing $32M in funding and capacity-building to disadvantaged communities deploying shared and electric mobility solutions. The program is administered by CALSTART and SUMC in partnership with CivicWell and GRID Alternatives. For more information about Clean Mobility Options, visit the project site or read more at the Mobility Learning Center.
A global transition to electric mobility is a question of when, not if. Thirteen countries have committed to halting the sale of ICE vehicles—including large vehicle markets such as the UK, France and China. In all three, 100% of new residential buildings must be fitted with wire conduits or provide large up-front subsidies for the build-out of charging stations. Technology-enforcing regulations like these have helped spur the rapid growth of PEV models. By 2025, European automakers such as BMW, Daimler, Mercedes-Benz, Fiat-Chrysler, Audi, Volkswagen and Volvo will have each spent tens of billions of dollars to transition production away from ICE models with others such as General Motors, Honda and Toyota close behind. As shared mobility continues to expand and evolve, this trend will only improve the viability of electrification.
Even in the absence of greater federal leadership, states, regions and cities around the country continue to plan for and fund efforts for shared and electric mobility across modes. To scan for shared and electric initiatives around the country, visit ArcGIS.
References are organized by section.
Relation to Shared Mobility
[i] A Review of Consumer Preferences for and Interactions with Charging Infrastructure (Hardmen, 2018)
Shared Mobility Concepts and Definitions
[i] The Micromobility Revolution: The Introduction and Adoption of Electric Scooters in the United States (Clewlow, 2018)
[ii] Broadening Understanding of the Interplay Among Public Transit, Shared Mobility and Personal Automobiles (Feigon, 2018)
[iii] Measuring the Impact of an Unanticipated Disruption of Uber/Lyft in Austin, TX (Hampshire, 2016)
[iv] The Growth of App-Based Ride Services and Traffic, Travel and the Future of New York City (Schaller, 2017)
[v]Carsharing’s Impact and Future (Shaheen, 2019)
Electric Mobility Concepts and Definitions
[i]Electric Trucks and Buses Overview (Atlas, 2019)
[ii]Interoperability of Public EV Charging Infrastructure (Electric Power Research Institute, 2019)
[iii] Quantifying the Electric Vehicle Charging Infrastructure Gap Across U.S. Markets (ICCT, 2019)
[iv] Lessons Learned on Early Electric Vehicle Fast-Charging Deployments (ICCT, 2018)
[v] When does electrifying shared mobility make sense (ICCT, 2019)
[vi] Electrifying Ridehail Services (Atlas, 2018)
[vii] Battery Electric Buses: State of Practice (TCRP, 2018)
[viii] Federal and State Issues Affecting Deployment (Congressional Research Office, 2019)
Funding and Policy
[i] Guide to Federal Funding, Financing and Technical Assistance for Plug-in Electric Vehicles and Charging Stations (EERE, 2016)
[ii] PEV Policy Evaluation Rubric (NASEO, 2018)
[iii] Transportation Governance and Finance: A 50 State Review (National Conference of State Legislatures, 2016)
[iv] Proposed Fiscal Year 2019-20 Funding Plan for Clean Transportation Incentives. (CARB, 2019).
[v] Electric and Equitable: Learning from the BlueLA Carsharing Pilot, Los Angeles, CA, 2019 (SUMC, 2019)
[vi]The Story of Green Raiteros: A Shared & Electric Lifeline for California Farmworkers, 2020 (SUMC, 2019).
[vii] Our Community CarShare, Sacramento, CA, 2020. (SUMC, 2020)