A journey from one room to another that requires the player to be on a vehicle.

Let's say that our protagonist is about to flee . Obviously, he can't make the journey on foot; he needs transportation.

"Peugeot"
Include Rideable Vehicles by Graham Nelson.
The Lot is a room. The ten-speed bike is a rideable vehicle in the Lot.

We make the ten-speed bike a rideable vehicle because we want to say that the player is on it rather than in it. Then our other room:

Cambridge is east of the Lot.

And now we borrow from the Actions chapter to prevent travel without the proper equipment:

Instead of going to Cambridge when the player is not on the ten-speed bike:
   say "It's a long journey to Cambridge: you'll never make it on foot."
After going to Cambridge:
   say "You begin pedalling determinedly.";
   continue the action.
Test me with "e / get on ten-speed bike / e".
Test me with "e / get on ten-speed bike / e".
Lot
You can see a ten-speed bike here.

>(Testing.)

>[1] e
It's a long journey to Cambridge: you'll never make it on foot.

>[2] get on ten-speed bike
You mount the ten-speed bike.

>[3] e
You begin pedalling determinedly.

Cambridge (on the ten-speed bike)