Trains on the £50 billion HS2 high-speed line between Birmingham and London should have on-board GPs, shops and gyms, according to a 'wish list' drawn up by passengers.
Travellers would also like to see 100-journey tickets rather than tickets for a fixed period of time while carriages should be big enough for buggies and bicycles.
Passengers should be guaranteed a seat even in peak hours while there could be standing areas on shorter journeys for those on lower-cost tickets.
The ideas for HS2, whose first phase will run between Birmingham and the capital from 2026, came from a panel of 40 passengers selected by rail customer watchdog Transport Focus.
As well as the GPs, shops and gyms, the panel wanted to see different levels of comfort reflected in differing prices, fares "affordable to the masses" and tickets which included all modes of transport such as buses and taxis.
Passengers also said they would like to see showers and sleeping facilities and GPS-enabled mobile app directions so passengers can find their seats easily along with other suggestions.
Transport Focus chief executive Anthony Smith said: "Building a brand new railway presents a unique opportunity for passengers.
"HS2 has the potential to transform travel between our major cities but this can only be achieved by really understanding the needs of passengers.
"To build greater trust with passengers, it is important not only to deliver a punctual and reliable service, but a service with passengers at its heart."
HS2 technical director Professor Andrew McNaughton added: "HS2 will transform long-distance rail travel in the UK and that's why it's so important that we listen to what passengers want.
"Today's report will help us focus on the issues that matter."
