Roads offered the enemy fast routes to their objectives and consequently they were blocked at strategic points. Many of the road-blocks formed by Ironside were semi-permanent. In many cases, Brooke had these removed altogether, as experience had shown they could be as much of an impediment to friends as to foes. Brooke favoured removable blocks.{{sfn|Ruddy|2003|p=27}}
The simplest of the removable roadblocks consisted of concrete anti-tank cylinders of various sizes but typically about {{convert|3|ft|m}} high and {{convert|2|ft|cm}} in diameter; these could be manhandled into position as required.{{sfn|Lowry|2004|p=25}} Anti-tank cylinders were to be used on roads, and other hard surfaces; deployed irregularly in five rows with bricks or kerbstones scattered nearby to stop the cylinders moving more than 2 ft (0.60m). Cylinders were often placed in front of socket roadblocks as an additional obstacle.{{unreliable source?|date=April 2021}}<ref>{{unreliable source?|date=April 2021}} {{cite web |title=Site Type Guide: Anti Tank Blocks |url=https://ukswwh.wordpress.com/site-type-guide/anti-tank-blocks/ |website=UK Second World War Heritage |date=May 2020 |access-date=30 January 2021}}</ref> One common type of removable anti-tank roadblock comprised a pair of massive concrete buttresses permanently installed at the roadside; these buttresses had holes and/or slots to accept horizontal railway lines or [[I-beam|rolled steel joists (RSJs)]]. Similar blocks were placed across railway tracks<ref>[[:File:Railway block on Taunton Stop Line.JPG|Image of removable railblock buttresses on the Taunton Stop Line near Donyatt]].</ref> because tanks can move along railway lines almost as easily as they can along roads.<ref name = RobOsborn>{{cite web| url=http://www.yeovilhistory.info/roadblock.htm| title=Road and Rail blocks | author = Bob Osborn | year = 2019 | work=Yeovil's Virtual Museum | access-date=9 January 2022}} A rare extant example.</ref> These blocks would be placed strategically where it was difficult for a vehicle to go around{{spaced en dash}}anti-tank obstacles and mines being positioned as required{{spaced en dash}}and they could be opened or closed within a matter of minutes.{{citation<ref name needed|date=January2022}}RobOsborn/><ref>{{cite web| title=Imperial War Museum Collection Search | work=Photograph number H 7330, Home Guards erecting a road barrier | url=http://www.iwm.org.uk/collections/item/object/205195194 | access-date=29 June 2012}}</ref>
[[File:Railway block on Taunton Stop Line.JPG|thumb|left|Removable roadblock buttress on the [[Taunton Stop Line]]]]
