Trade Routes

Part of Trade & Currency

How to identify, establish, maintain, and protect the paths that connect communities for long-distance commerce.

Why This Matters

Trade routes are physical infrastructure with profound economic consequences. A good route reduces travel time, lowers transport costs, and opens access to goods that cannot be produced locally. A poor route or no route confines a community to what it can produce within a day’s walk — which in most environments means a severely limited material standard of living.

The great historical trade routes — the Silk Road, the Amber Road, the Incense Route — did not just move goods. They moved knowledge, plants, animals, techniques, and people. Communities along trade routes developed faster technologically and culturally than isolated ones. The economic benefit of route access accumulates over generations.

For a rebuilding community, investing in route infrastructure — survey, clearing, bridge-building, waystation construction, security — pays off rapidly in lower trading costs and broader access to goods. The investment is not glamorous, but its returns are consistent and large.

Surveying and Route Selection

The best route between two points is rarely a straight line. Terrain, water crossings, climate, security, and forage availability all shape the optimal path. Survey candidate routes before committing to any.

Evaluate each candidate on five criteria. Distance: the total length, but weight this by terrain difficulty — a 40km road over flat ground may be easier than a 25km route over mountains. Water crossings: the number and difficulty of rivers, swamps, and flood-prone areas. Seasonal reliability: does the route become impassable in winter? In spring flood season? In summer drought? Security: is the route exposed to bandit activity, hostile communities, or wildlife hazards? Forage: can animals traveling the route find water and fodder?

Walk candidate routes yourself before deciding. A route that looks good on a sketch map may have a critical flaw — a cliff face, a permanently boggy section, a river with no ford — that only reveals itself on the ground. Note exact distances between landmarks using a measured pace or counting wheel. Mark hazards and water sources on a sketch.

Choose the route that optimizes total cost of travel, not just distance. The trade-off between a shorter, harder route and a longer, easier one depends on the goods being moved. Heavy bulk goods (grain, stone, timber) favor the easiest terrain even at higher distance. High-value light goods (metal, spices, cloth) can tolerate harder terrain for shorter routes.

Route Infrastructure: Clearing and Grading

A natural path becomes a trade route through investment in clearing and grading. The minimum standard for a functional trade route: 3m wide (enough for a loaded pack animal plus a person passing in opposite direction), firm surface (no sections where animals sink to the knee), and no overhead obstructions (branches cleared 3m above the path surface).

Clear vegetation to the minimum width, but cut overhanging branches generously — a branch at face height injures travelers and damages loads. Remove large rocks from the path surface. Fill significant ruts and holes with compacted gravel or packed clay. On slopes, cut drainage channels across the path every 10–20m to prevent erosion channels from forming.

Grade steep sections to a maximum of 12–15% incline for loaded draft animals, or 20% for pack animals. Switchback steep hillsides rather than climbing directly. Cut into the hillside to create a level path surface, and build a retaining wall of dry stone on the downhill side. The retaining wall prevents the cut fill from washing away and creates a visible path edge that guides travelers in poor visibility.

Water Crossings

River and stream crossings are the weakest points on any trade route. A ford that is passable in summer may be impassable in spring flood. A ford that is safe for people may drown loaded oxen. Invest in water crossing infrastructure proportional to the route’s importance.

Survey all crossings for seasonal variation. Mark high-water lines with permanent stakes so travelers can judge conditions. Identify the safest crossing point — typically the widest, shallowest section, with firm bottom and gradual banks. Clear debris from the crossing seasonally; a ford silts up and channels shift.

Improve fords with paved stone bottoms. Lay flat stones across the ford bed, set into the streambed, to prevent hooves from sinking into soft bottom. Install guide ropes across the crossing tied to stakes on each bank — travelers can hold the rope in fast water. Post maximum-safe water level markers.

For permanent important routes, build bridges. A simple timber bridge for pack animals requires 4–6 hardwood beams spanning the channel, cross-braced, with a planked surface. Design for the maximum flood load your crossing has seen, plus a safety factor. Inspect annually before the high-water season; replace rotting members immediately.

Waystation Network

Long routes require stopping points every 20–30km — a comfortable day’s travel for loaded animals. Waystations provide water, emergency food, basic shelter, and human presence (a keeper who can assist travelers in distress and report bandit activity).

A minimal waystation: a fresh water source (well, spring, or reliable stream), a covered shelter for 10–15 people, a corral or tethering post for animals, and basic emergency supplies (firewood, dry grain, basic medical supplies). The keeper’s dwelling can be part of the waystation structure or adjacent to it.

Fund waystations through tolls on route users. A fixed toll per person and per animal, collected at the waystation, pays the keeper’s wages and maintenance costs. Keep tolls low — the goal is cost recovery, not profit. High tolls divert traffic to informal alternative paths or trigger evasion.

The keeper’s role is more than hospitality. They maintain the local section of the route (reporting and patching damage), record all travelers passing through (name, destination, goods carried), provide information about conditions ahead, and serve as a first responder to accidents and incidents. The accumulated travel records are valuable intelligence about trade volumes and patterns.

Security and Corridor Governance

A trade route traverses multiple territories. Security requires cooperation among all communities along the route, not just the endpoints. A bandit operating freely in the middle section undermines the entire route, even if the endpoint communities are perfectly secure.

Establish a corridor agreement among all communities along the route. The agreement should specify: each community’s obligation to patrol and maintain the route section within their territory, a protocol for reporting and pursuing bandits (joint pursuit across territory boundaries), liability for losses suffered on each community’s section, and a governance mechanism for route upgrades and fee-setting.

Hold an annual corridor meeting among representatives of all communities. Review security incidents, maintenance needs, toll rates, and any proposed changes. Decisions affecting the whole route should be unanimous or near-unanimous — a community that feels overruled may stop fulfilling its maintenance and security obligations.

Post route markers at all major intersections: the corridor authority’s symbol, distance to next waystation, and next major destination. Travelers who know where they are and how far they have to go are less likely to make costly navigation errors. Markers also signal that the route is governed — a deterrent to banditry.