In Fallout 4, supply lines play a crucial role in connecting settlements and ensuring the efficient flow of resources between them. When you establish a supply line between two settlements, it allows you to share resources, such as food, water, and crafting materials, between the connected settlements.
To answer your question, supply lines do run both ways. When you connect Settlement A to Settlement B with a supply line, Settlement A gains access to the resources stored in Settlement B, and vice versa. Essentially, the supply line creates a two-way connection, allowing settlements to share their resources with each other.
It’s important to note that the supply line connection forms an unbroken string, meaning that Settlement A can only access the resources of Settlement B if there is a continuous chain of supply lines connecting them. For example, if you have Settlement A connected to Settlement B, and Settlement B connected to Settlement C, Settlement A will indirectly have access to the resources of Settlement C. However, if you were to establish a separate supply line between Settlement A and Settlement C without connecting it to Settlement B, then Settlement A and C would have separate supply lines and would not be able to share resources.
To illustrate this concept further, let’s consider an example. Imagine you have three settlements: Sanctuary, Red Rocket Truck Stop, and Abernathy Farm. If you establish supply lines between Sanctuary and Red Rocket Truck Stop, as well as between Red Rocket Truck Stop and Abernathy Farm, it forms a continuous chain of supply lines. As a result, all three settlements will be connected, and resources stored in any of these settlements will be accessible to the others.
However, if you were to establish a separate supply line directly between Sanctuary and Abernathy Farm without connecting it to Red Rocket Truck Stop, Sanctuary and Abernathy Farm would be isolated from each other in terms of resource sharing. They would essentially have separate supply lines and would not be able to access each other’s resources.
Supply lines in Fallout 4 allow for the sharing of resources between settlements. However, for the supply lines to work both ways, there must be an unbroken string of supply line connections between the settlements.