Passengers have called for action from First Great Western after days of peak time service problems.
The 8am Maidenhead to London Paddington service was repeatedly cut from seven cars to three or four due to a shortage of fast trains, and other services were late.
Commuters used social media sites to express their anger on disrupted days, including Thursday, Friday and Monday.
A FGW spokesman attributed the lack of High Speed Trains (HST) to the fact one was damaged on Saturday last week.
"We appreciate this was frustrating for commuters travelling from Maidenhead and thank them for their understanding and patience," he said.
The chaos came as FGW announced National Passenger Survey scores show 83 per cent of passengers are satisfied with its service.
The survey was conducted by independent watchdog Passenger Focus in autumn 2011.
A statement from FGW on Thursday said its scores had increased for the fifth year running.
But complaints flooded Twitter labelling its trains as 'poor' and fares 'overpriced'.
FGW said it is investing in 46 new carriages for London and the Thames Valley to improve capacity by this summer.
The spokesman said peak services through Maidenhead including the 8am would benefit.
Others include the 7.44am Henley to Paddington and the 5.33pm Paddington to Oxford.
See today's Advertiser for a full report.
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The crash, which took place at about 7am today (Thursday), involved three vehicles. One man sadly died as a result of the collision and his next of kin have been informed.