If you paid $16.00 to go from the Poly to the BW you were robbed!
We took a taxi in June from the Boardwalk to Holy Family Church in Orlando. I had no idea how far it was. The driver had to call his office for directions. This cost us $35.00 for a very long ride which took us quite a distance from WDW. If I had known it was so far we would have chosen the much closer Mary, Queen of the Universe Shrine which is right outside WDW.
I cannot imagine how you paid $16.00 unless you sat in traffic or the driver rode around in circles, maybe lost. Not for a five minute drive. We were on the road at least 25 minutes and went many, many miles for $35.00.
Most trips anywhere within WDW should average around $8.00 or so.