Section: Social Complexity

Subsection: Transport infrastructure

Bridge

Talking about transport infrastructure, bridges refers to bridges built and/or maintained by the polity (that is, code 'present' even if the polity did not build a bridge, but devotes resources to maintaining it). (See here)

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Metadata:

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Variable	Definition
Polity	The Seshat Polity ID
Year(s)	The years for which we have the data. [negative = BCE]
Tag	[Evidenced, Disputed, Suspected, Inferred, Unknown]
Verified	A Seshat Expert has approved this piece of data.

Variable	Definition
bridge	The absence or presence of bridge for a polity.

Actual Data:

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#	Polity	Year(s)	Bridge	Description	Edit
91	(Exarchate of Ravenna)	Full Year Range of Exarchate of Ravenna is assumed. [568, 751]	present	None
92	(Western Roman Empire - Late Antiquity)	Full Year Range of Western Roman Empire - Late Antiquity is assumed. [395, 476]	present	None
93	(Andronovo)	Full Year Range of Andronovo is assumed. [-1800, -1200]	unknown	None
94	(Saadi Sultanate)	Full Year Range of Saadi Sultanate is assumed. [1554, 1659]	unknown	None
95	(Jenne-jeno I)	Full Year Range of Jenne-jeno I is assumed. [-250, 49]	unknown	None
96	(Jenne-jeno II)	Full Year Range of Jenne-jeno II is assumed. [50, 399]	unknown	None
97	(Jenne-jeno III)	Full Year Range of Jenne-jeno III is assumed. [400, 899]	unknown	None
98	(Jenne-jeno IV)	Full Year Range of Jenne-jeno IV is assumed. [900, 1300]	unknown	None
99	(Mali Empire)	Full Year Range of Mali Empire is assumed. [1230, 1410]	unknown	None
100	(Kushan Empire)	Full Year Range of Kushan Empire is assumed. [35, 319]	unknown	None

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