To create a public transportation flood map I will be storing my data in a Geodatabase within Feature datasets.  The data downloaded from Pierce County was: Flood Hazard Areas, Pierce Co. base map and Pierce County Public Transit.  This data was added to my map as layers.  I exported specific bodies of water from the attribute table and created a new layer.  I then clipped the Public Transit to only show what is in Pierce County.

I then began my analysis to determine which public transportation routes will be most adversely affected by severe flooding in Pierce County.  First, I dissolved the Public Transit Clipped layer to create single lengths for transit routes, which I then converted the length from feet to miles.  Next, I overplayed the new dissolved routes to find where these routes intersected the flood areas. New lengths for effected roads are then given new lengths based on intersect. I was able to take new lengths and classify what the hazard percent was per routes impacted by flooding.  I did this by dividing the miles by total length and multiplying by 100.  I then changed the color ramp to be green to red to visually show which transit routes are impacted by color.