Urban Air Mobility Systems and Technologies

Urban air mobility (UAM) refers to a vision for on-demand aerial transportation within and around cities, enabled by electric or hybrid electric vertical take-off and landing (eVTOL) aircraft. By exploiting underused airspace, UAM promises to relieve surface congestion, reduce journey times and lower emissions. Key technological enablers include advances in battery energy density, distributed electric propulsion for improved efficiency and noise reduction, and autonomous or pilot-assisted flight controls. Effective deployment hinges on a network of vertiports—specialised hubs for boarding, charging and maintenance—and seamless integration with existing air-traffic management and multimodal ground transport. Operational concepts range from scheduled “air metro” services on fixed routes to flexible point-to-point air taxis and cargo drones. System-level challenges encompass energy and life-cycle emissions assessment, infrastructure siting and capacity, noise and safety regulations, and market acceptance. Early use-cases in emergency response and parcel delivery are demonstrating technical feasibility, while city-scale simulations highlight potential travel-time savings of up to 50 percent for longer intra-urban trips. Together, these developments point to a gradual introduction of UAM into the mobility mix, initially in well-defined niches before wider public adoption.

Research from Nature Portfolio

Recent studies have undertaken comparative life-cycle analyses of eVTOL aircraft versus ground vehicles, quantifying primary energy use and greenhouse-gas emissions. Findings indicate that tilt-rotor and ducted-fan configurations deliver fuel-to-wing efficiencies comparable to cars in cruise, yet incur elevated energy demands during vertical climb. For typical urban missions, a single-occupant eVTOL emits roughly one-third less CO₂ than a petrol car but more than a battery-electric car. When fully loaded, eVTOLs achieve 50 percent lower per-passenger emissions than internal-combustion vehicles and slightly outperform ground electric vehicles. The study highlights that trip distance and loading factors critically shape the sustainability profile, suggesting a niche role for UAM in medium-range, time-sensitive journeys where ground congestion is severe.

Urban Air Mobility Systems and Technologies publication trend

The graph below shows the total number of articles in urban air mobility systems and technologies across all publications each year (not limited to Nature Index journals).

Technical terms

Urban air mobility (UAM): A transportation concept using small, electric or hybrid aircraft to move passengers or cargo over short urban distances.

Electric vertical take-off and landing (eVTOL): Aircraft powered wholly or partly by electric systems capable of vertical lift and descent without runways.

Distributed electric propulsion (DEP): An architecture employing multiple, spatially distributed electric propulsors to enhance efficiency, control and noise performance.

Vertiport: A specialised facility that supports vertical take-off and landing operations, providing landing pads, passenger handling, charging and maintenance services.

References

1. Drone-based vertical delivery system for high-rise buildings: Multiple drones vs. a single elevator. Communications in Transportation Research (2024).
2. A service network design for scheduled advanced air mobility using human-driven and autonomous air metro. Decision Analytics Journal (2023).
3. Urban Air Mobility: Systematic Review of Scientific Publications and Regulations for Vertiport Design and Operations. Drones (2022).
4. Potential Urban Air Mobility Travel Time Savings: An Exploratory Analysis of Munich, Paris, and San Francisco. Sustainability (2021).
5. The promise of energy-efficient battery-powered urban aircraft. Proceedings of the National Academy of Sciences of the United States of America (2021).
6. Advanced Air Mobility: Opportunities and Challenges Deploying eVTOLs for Air Ambulance Service. Applied Sciences (2022).