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__NOTOC__[[File:Case_20150307.jpg|thumb|300px|right|No 489, L696MRM at Highley (2015)]] [[File:Roadrailers_20180324.jpg|thumb|300px|right|Former Rexquote Super Railer at Highley with No 489 behind (2018)]] The SVR uses Road-Rail Vehicles, also referred to as RRVs or 'road railers', for permanent way work. RRVs are modified versions of road vehicles, in this case excavators, which retain their normal wheels with rubber tyres. They are also fitted with additional flanged steel wheels which can be raised and lowered as required, enabling them to run on rails. The flanged wheels are free-rolling with propulsion on the rails being provided by the conventional tyres.

1994-built Case-Poclain 688-BP Excavator No 489 (DVLA Registration '''L696MRM''') was first recorded on the SVR at Kidderminster on 9 June 2007 and has been resident since.<ref>[https://www.ontrackplant.com/road-railers/preserved/841 OnTrackPlant.com] (requires login to view sightings history)</ref> Despite its age, its simple nature means it still provides useful service to the Permanent Way team. When rail-mounted it can be used either 'stand-alone' or paired with its trailer vehicle as seen below. <gallery mode=packed heights=200px style="text-align:left">Case_20150307.jpg|No 489, L696MRM at Highley (2015)Case_20210423.jpg|L696MRM with its trailer vehicle at Kidderminster, April 2021</gallery>