| This
sketch illustrates an example of how the street system and the greenspace
system can be interwoven to preserve ecological linkages.
On this low volume road an old-fashioned, one-lane "cueing" bridge
has been used where the street system crosses the stream corridor.
Bridges like this one have much less impact on unique and fragile
ecosystems than do the more typical drain culverts. This once
common type of bridge costs less than two-lane bridges, calms traffic,
and provides a pedestrian scale. It also protects natural
movement corridors for fish and terrestrial animals by creating
a point of intersection between the road network and the linked
greenspace system.
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