Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 19 — Roads, bridges, flyovers and tall buildings  /  About year 68
19.20

Dual carriageway

two separate roadways, one for each direction, for fast traffic between the settlements

MakingYear 68Stands on 344 earlier

AWhat it needs

Needs 344 other products in all, 3 of them directly.

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