About 65,000 rugby fans headed to Cardiff's Principality Stadium on Saturday with a full city centre road closure in force.
Wales are taking on Australia in the second of four November internationals after a 17:20 GMT kick-off.
Roads will be closed until 20:15, and fans were urged to get to the stadium early due to enhanced security checks, as with Wales v Scotland last weekend.
It is the second match where 4,000 seats make up an alcohol-free zone.
The trial is taking place after fans complained of drunkenness, rowdiness and some people constantly leaving their seats to buy alcohol throughout matches.
As well as the city centre road closures, the M4 near Cardiff was expected to be busy.
Transport for Wales had advised fans to use Queen Street station if they are travelling on valleys services after the match and central for mainline destinations, Ebbw Vale and Maesteg.
There were no planned engineering works in south Wales or on the line from London, but passengers travelling from the west of England via Bath or Bristol Temple Meads needed to get a replacement bus.
Cardiff council had also urged locals to consider using bikes for short journeys on Saturday.
It said research showed 52% of car trips in the capital were for journeys of less than 3.1 miles (5km), a distance it believes can be cycled in 20 minutes.