The biggest critics of HEx are those who don't really understand its market.
It is aimed at people (particularly business travellers) who would otherwise get taxis from Heathrow to Central London to avoid the 'throng' on normal transport and get the best door to door journey time. It is not really competing with other rail based transport.
Against a taxi fare to Central London, HEx fares then suddenly seem much better value (comparing HEx with the Piccadilly Line service is almost apple and banana). *This* is what they are going for.
It is for this reason I believe HEx will still have something of a market post Crossrail. Diminished slightly in the leisure market perhaps, yes, but still popular with people arrivimg tired off long flights who want to get to Zone 1 fast then taxi to final destination.
This is the correct analysis - right from the start HEx fares were intended to be competitive with TAXI fares to central London. If anyone on this Forum thinks that somebody arriving at Heathrow at 6.30 in the morning after 10 hours in a plane from Buenos Aires would voluntarily use the Piccadilly line because it's a few pounds cheaper is living in cloud-cuckooland.
The Heathrow Express website states:
On average 17,000 passengers use our service each day.
so the numbers are not insignificant.
The other factor that is often forgotten in these discussions is - the income for the railway business. I would suggest that the income generated by HEx is out of proportion to its passenger numbers. Simplifying the the numbers slightly, an annual season from Reading to Zones 1-6 costs around £5,000. Assuming it is used on 200 days in the year this equates to a daily ticket price of £12.50 each way for a 36 mile journey. People using HEx are unlikely to be using season tickets for obvious reasons and the single peak fare is £25 for a distance of about 15 miles (off-peak £22). This equates to 35p per mile for the Reading commuter and 167p per mile for the traveller to Heathrow.
So, very approximately, HEx earns four and a half times as much per passenger per mile as the commuter trains between Reading and London. One should think very carefully before putting this income at risk.
As
Ianno87 suggests, the leisure travel component of these 17,000 people each day may fall after Crossrail opens, but this will only affect those living within easy reach of Crossrail - i.e., the Central Line corridor through London - with possibly some transfer from Thameslink at Farringdon. Crossrail will not greatly affect the travel plans of leisure passengers whose origin or destination do not permit an easy or quick connection to it but can reach Paddington easily by bus, tube or taxi.