How it can be built
Implementation
StarRoad is planned as a sequence of technologically connected and economically justified stages. Each phase has clear objectives and success criteria and creates the infrastructure needed by the next, reducing technical and financial risk.
Phase 0 Concept validation and testing2–5 years Open phase
Objective: Validate the physical principles, develop the critical technologies under laboratory conditions and establish an engineering foundation.
Key activities
- Detailed mathematical and CFD modelling of every process: acceleration, gateway operation and aerodynamic impact.
- Form an international consortium and reach preliminary political and legal agreements.
- Conduct geological and environmental surveys along the entire route.
- Establish research test sites away from the main location:
- bench-test superconducting levitation modules and pulsed-power systems;
- build and test a 1:10-scale gas-dynamic gateway prototype to confirm that a stable graded barrier can be formed;
- excavate a short 1–2 km vacuum demonstration tunnel to develop the integration of vacuum systems, magnetic acceleration of light test articles and safety systems.
Success criterion: Experimental data confirm the viability of the gateway, levitation and stabilization solutions. The detailed engineering design for Phase 1 is ready.
Phase 1 Infrastructure and energy anchor5–7 years Open phase
Objective: Create the project’s “energy backbone” and develop robotic construction under field conditions.
Key activities
- Begin small-series production of standardized robotic tunnel-boring machines with a diameter of 2 metres.
- Excavate the first pair of GATES trunk collector tunnels in parallel along the full route—about 2,050 km—to establish the initial thermal-stabilization circuit.
- Build the first geothermal plants using supercritical CO₂ captured by direct air capture (DAC) at key points along the route.
- Above the GATES collectors, excavate a small-diameter prototype test tunnel—D=2 m, L=2,050 km—with basic vacuum, communications and service systems.
Success criterion: A minimal GATES configuration is fully operational and energy-autonomous. High-speed robotic excavation has been demonstrated, creating the basis for subsequent expansion.
Phase 2 Small-scale validationScientific and instrumentation complex status · 4–6 years Open phase
Objective: Verify system synchronization and safety at realistic speeds and collect unique experimental data.
Key activities
- In the small test tunnel, accelerate and brake inert test articles weighing up to several tonnes at speeds from 1 to 11 km/s.
- Conduct full-scale tests of a 1:5 gas-dynamic gateway prototype with a small experimental shuttle passing through it.
- Test the “inertial ram” hypothesis experimentally by launching test masses with different structures and thermal protection to measure acceleration loads and heat fluxes.
- Begin detailed design and prototype manufacture of the full-scale shuttle’s key systems, including superconducting magnets and thermal accumulators.
Success criterion: All synchronization systems operate stably and safely. The gas-dynamic gateway is proven effective. Experiments confirm that specific loads decrease as mass increases. The shuttle’s preliminary design is complete.
Phase 3 Full-function section and shuttle prototype4–7 years Open phase
Objective: Integrate and test production-representative systems over a substantial section and create a flight prototype.
Key activities
- Build a fully functional 50–200 km section of the main acceleration tunnel with its final 17.5 × 12.5 m cross-section, including every winding, energy store and service tunnel.
- Expand GATES beneath this section to its complete seven-tunnel configuration.
- Build and comprehensively test a full-scale shuttle prototype without propulsion under ground conditions, covering cryogenic systems, structural strength and thermal protection.
- Run integrated tunnel tests by accelerating and braking shuttle-representative masses at up to 8g and about 4 km/s. Exercise every Alarm 1–3 emergency protocol.
- Develop, ground-test and certify a compact onboard nuclear reactor for the fully functional AstroLiner.
Success criterion: Repeated acceleration and emergency-stop cycles are completed without critical damage. Energy recovery is proven effective. The flight shuttle and reactor are ready for final integration.
Phase 4 Line extension and commissioning10–15 years Open phase
Objective: Complete the first line, integrate the shuttle and reach operating speed.
Key activities
- Extend the acceleration tunnel in stages to its design length of 2,050 km by operating many tunnel-boring machines in parallel.
- Scale the GATES infrastructure and pulsed-energy stores along the full route.
- Build the final high-altitude gateway complex on Mount Mohi.
- Integrate the shuttle’s onboard systems and conduct ground and low-speed tunnel tests.
- Carry out staged launches, gradually increasing speed and mass until the design values of 15,000 tonnes and about 11 km/s are reached.
Success criterion: The first successful hypersonic shuttle launch places a payload on its target orbit. The design launch cadence of one or two per month is achieved.
Phase 5 Scale-up and industrial operationContinuous Open phase
Objective: Turn StarRoad into a continuously expanding global infrastructure system.
Key activities
- Operate the first line and refine its logistics cycles: loading, servicing and return.
- Begin building a second and subsequent parallel lines to increase cargo throughput.
- Use the project’s industrial centres as the base for orbital shipbuilding and processing facilities.
- Develop a network of branches—shorter accelerators for people and specialized cargo.
Success criterion: Delivery cost falls below $10/kg. Launches take place daily. An approved plan exists for the next trunk lines and their construction has begun.
Industrial centres and overall timeframe
Production infrastructure is divided between coastal and highland complexes. The overall schedule depends on the scale of parallel construction, the deployment of power infrastructure and international coordination.
Coastal complex
Mouth of the Nyanga River, Gabon. Shuttle construction, production of modules for the initial tunnel segments, and the main home port for shuttle servicing.
Highland complex
Mount Mohi and the southern plateau, Democratic Republic of the Congo. Production of modules for the high-speed segments and final S-curve, plus assembly and servicing of the gateway mechanism.
The complex includes three independent hydrogen electrolysis and storage channels. Even in an emergency, each channel can supply all three engine rings of the gateway’s gas-dynamic barrier.
Electricity for electrolysis comes from local sources—GATES, hydroelectric, solar and nuclear plants—integrated into the project grid.
Overall timeframe
The first tunnel requires many advanced but currently feasible technologies and engineering solutions, alongside parallel work by numerous tunnel-boring machines, infrastructure deployment and two manufacturing centres. From the start of Phase 0 to the first commercial launch in Phase 4, implementation is therefore estimated at about 25–40 years.
This timeframe is comparable with that of other megascience projects, including ITER and LIGO.
Under these conditions, the schedule and pace depend primarily on financing and diplomatic and legal agreements, rather than on fundamental technical feasibility. The undertaking is ambitious, but potentially achievable for a global consortium.