The article clearly states the tunnels with have a tunnel ventilation system, which is standard fire suppression strategy for underground tunnels for subways.
> electrical systems
They're already laying power cables for the tunnel lighting system which is presumably for their autonomous driving system with cameras, which now has a single dependency on their tunnel lighting system.
The rest, sure, I agree can be cheaper comparatively to a subway tunnel.
> steep inclines/sharper angles
Why would you want steep inclines (more than 5% standard for metros) if you're already underground and use lifts to ascend? The electric skates will still have a kinematic envelope that the tunnel has to adhere to, especially if they're for standing passengers. I don't see how this differs substantially from subway tunnels to allow steeper inclines/sharper angles.
The article clearly states the tunnels with have a tunnel ventilation system, which is standard fire suppression strategy for underground tunnels for subways.
> electrical systems
They're already laying power cables for the tunnel lighting system which is presumably for their autonomous driving system with cameras, which now has a single dependency on their tunnel lighting system.
The rest, sure, I agree can be cheaper comparatively to a subway tunnel.
> steep inclines/sharper angles
Why would you want steep inclines (more than 5% standard for metros) if you're already underground and use lifts to ascend? The electric skates will still have a kinematic envelope that the tunnel has to adhere to, especially if they're for standing passengers. I don't see how this differs substantially from subway tunnels to allow steeper inclines/sharper angles.