London streets are um... a _legacy_ system, so it's not surprising that it takes more time. I'm not sure if Black Cabs hold a monopoly on London taxis, but if

London streets are um... a _legacy_ system, so it's not surprising that it takes more time. I'm not sure if Black Cabs hold a monopoly on London taxis, but if they are competing in a market, then it's just that they are providing a higher level of service, and are training at that level. Waze + a human will probably do a "good enough" job.