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/* $Id$ */

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/** @file transport_type.h Base types related to transport. */

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#ifndef TRANSPORT_TYPE_H

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#define TRANSPORT_TYPE_H

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typedef uint16 UnitID;

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enum TransportType {

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	/* These constants are for now linked to the representation of bridges

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	 * and tunnels, so they can be used by GetTileTrackStatus_TunnelBridge.

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	 * In an ideal world, these constants would be used everywhere when

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	 * accessing tunnels and bridges. For now, you should just not change

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	 * the values for road and rail.

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	 */

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	TRANSPORT_BEGIN = 0,

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	TRANSPORT_RAIL = TRANSPORT_BEGIN,

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	TRANSPORT_ROAD,

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	TRANSPORT_WATER,

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	TRANSPORT_AIR,

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	TRANSPORT_END,

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	INVALID_TRANSPORT = 0xff,

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};

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#endif /* TRANSPORT_TYPE_H */