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Marshfield consists of two line-side bridges, and a foot crossing, on the busy section of the South Wales mainline between Newport and Cardiff.
Railway type and traffic
Regular DMUs and HSTs operated by Arriva Cross Country, First Greet Western, and Arriva Trains Wales. The Ebbw Vale services which started in 2008 pass this location.
There is also plenty of freight here. Mostly DBS, there are also some Freightliner workings into Wentloog, including some class 70 turns.
The first location is on 'Broadway' road bridge, which is a quite well used road bridge. The second location is a short drive or walk away and is at the end of a path. The final spot is a foot crossing across the line. The bridge at the end of the path and the foot crossing are beautifully quiet except for the trains.
From M4 Junction 28:
Follow signs for Castleton/A48/St Mellons then at the roundabout, take the 2nd exit onto A48 heading to Castleton/St Mellons then:
Turn left at Marshfield Road
Turn right at St Mellons Road
Take the 1st left onto Wellfield Road
Turn right to stay on Wellfield Road
Take the 1st left onto Whitethorn Way
If only going to the road bridge then do NOT turn onto St Mellons Road and you will arrive at the road bridge.
Parking in Whitethorn Way should not be a problem for the foot crossing or the bridge at the end of the foot path. Parking at the 'Broadway' road bridge is a little more tricky, and perhaps parking in one of the side roads would be best.
The line runs North East to South West so sun on the front of eastbounds early in morning and on the front of westbounds from mid morning to mid afternoon when the sun will move onto the other side. Freight normally uses the freight lines which are to the south of the passenger lines. Photos possible with the sun on the side (until it moves round) of trains on any line.
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