Shanghai Trolleybus Route 20
... that Shanghai Trolleybus Route 20 was so popular in the 1980s that it required 65 buses to run as little as 30 seconds apart?
... that <b id="mwA0A"><a href="./Shanghai_Trolleybus_Route_20" id="mwA0E" rel="mw:WikiLink" title="Shanghai Trolleybus Route 20">Shanghai Trolleybus Route<span id="mwA0I" typeof="mw:Entity"> </span>20</a></b> was so popular in the 1980s that it required 65 buses to run as little as 30 seconds apart?