The Millennium Stadium is the stage for a feast of rugby this weekend and fans are advised to plan their journeys into the city centre early to avoid congestion and costly parking charges.
The semi-final double header sees Sale Sharks take on Leicester Tigers at 2.30pm and Cardiff Blues face the Ospreys at 5.15pm on Saturday March 24.
An estimated crowd of 50,000 is expected at the stadium and the best way for fans and visitors to travel to Cardiff is on public transport.
If you do bring your car into the city, fans should consider car sharing and using the park and ride services.
The park and ride sites can be accessed from J33 of the M4. You can park at County Hall (Green car park) where the drop off point is on Callaghan Square in the lay-by by Eversheds. Park and ride costs £5 per car which includes a return journey on the bus.
Coaches should leave the M4 at J32 and use the parking at the Civic centre. Parking opens at 9am. The last bus will leave the pick-up point at 8.30pm, with the car park closing at 9pm.
There will be a small road closure of Westgate Street from 1pm - 8.30pm.
The following roads will be closed for coach parking between 6am and 8pm -
King Edward VII Avenue from its abutment with Boulevard-de-Nantes to its junction with Corbett Road;
Museum Avenue from its junction with Gorsedd Gardens to its junction with Corbett Road;
City Hall Road / College Road from their junction with Museum Avenue to their junctions with North Road.
Cardiff Blues travel to Myreside on Friday to take on Edinburgh Rugby in a crucial Guinness PRO12 clash, and with Wales facing Scotland in the RBS 6 Nations at BT Murrayfield on Saturday, it promises to be a weekend of non-stop rugby action at the Scottish capital. Here are some useful advice to Cardiff Blues travelling supporters.
To celebrate the opening of the newly refurbished Guinness PRO12 Pack Bar, the world famous Irish brewer will be offering supporters free pints of the black stuff ahead of Saturday's clash with Ulster.
'TACKLE' - the first-ever joint community rugby initiative between the four professional teams in Wales has been launched (today Weds 19th October) bringing an inspiring new rugby education programme to young people in Communities First areas. Partners in the project were joined by Wales' star rugby internationals Sam Warburton (Cardiff Blues), Alun Wyn Jones (Ospreys), Gareth Davies (Scarlets) and Hallam Amos (Newport Gwent Dragons), for the launch at Aberdare Community School.
The Welsh Rugby Union, together with Pro Rugby Wales, has secured significantly improved insurance cover for all registered players, coaches and referees at each of its member clubs and regions at reduced costs -working with Aon, one of the world's largest insurance brokers and risk advisors.