Not sure I agree with this. Freeways carry about 2K cars per hour per lane [0], which in the USA translates to about 2-3K people per hour per lane. Rail transit systems can serve much, much more than thas -- typically 20K to 30K per hour per track in Europe and upto 54K in NYC and 81K in Hong Kong [1].
These are actual competent train systems that run trains every couple of minutes, not the idiotic once-per-hour Caltrain.
These are actual competent train systems that run trains every couple of minutes, not the idiotic once-per-hour Caltrain.
[0] http://onlinepubs.trb.org/onlinepubs/circulars/EC018/08_52.p...
[1] https://books.google.com/books?id=NbYqQSQcE2MC&pg=PA136&lpg=...