The product selector has been designed to aid you in the decision making process when specifying materials for your project. All SteelPhalt slag aggregates typically achieve a PSV of 62. However, following research undertaken by Transport Research Laboratory and published in reports PPR737, PPR773 and PPR810, along with further inhouse testing, SteelPhalt’s products performed satisfactory in all the categories identified in the highlighted cells within the table below (which is taken from CD236) where the recommended PSV is frequently higher than 62. To see what alternative products could be used, just hover the cursor over the required cell to show which SteelPhalt products we suggest. Any products / values not highlighted indicate there are no products currently available. NOTE: All options are SteelPhalt's recommendations but ultimately the product choice is down to the customer. Where designers are knowledgeable or have other experience of particular site conditions, an alternative PSV value can be specified. Site Category Site Description IL PSV required for given IL, traffic level and type of site Traffic (cv/lane/day) at design life 0-250 251-500 501-750 751-1000 1001-2000 2001-3000 3001-4000 4001-5000 5001-6000 Over 6000 A Motorway 0.30 50 50 50 50 50 55 55 60 65 65 0.35 50 50 50 50 50 60 60 60 65 65 B Non-event carriageway with one-way traffic 0.3 50 50 50 50 50 55 55 60 65 65 0.35 50 50 50 50 50 60 60 60 65 65 0.4 50 50 50 55 60 65 65 65 65 68+ C Non-event carriageway with two-way traffic 0.35 50 50 50 55 55 60 60 65 65 65 0.4 55 60 60 65 65 68+ 68+ 68+ 68+ 68+ 0.45 60 60 65 65 68+ 68+ 68+ 68+ 68+ 68+ Q Approaches to and across minor and major junctions, approaches to roundabouts and traffic signals 0.45 60 65 65 68+ 68+ 68+ 68+ 68+ 68+ HFS 0.5 65 65 65 68+ 68+ 68+ HFS HFS HFS HFS 0.55 68+ 68+ HFS HFS HFS HFS HFS HFS HFS HFS K Approaches to pedestrian crossings and other high-risk situations 0.5 65 65 65 68+ 68+ 68+ HFS HFS HFS HFS 0.55 68+ 68+ HFS HFS HFS HFS HFS HFS HFS HFS R Roundabout 0.45 50 55 60 60 65 65 68+ 68+ 68+ 68+ 0.5 68+ 68+ 68+ 68+ 68+ 68+ 68+ 68+ 68+ 68+ G1 Gradient 5-10% longer than 50m 0.45 55 60 60 65 65 68+ 68+ 68+ 68+ 68+ 0.5 60 68+ 68+ HFS HFS HFS HFS HFS HFS HFS G2 Gradient >10% longer than 50m 0.45 55 60 60 65 65 68+ 68+ 68+ 68+ 68+ 0.5 60 68+ 68+ HFS HFS HFS HFS HFS HFS HFS 0.55 68+ HFS HFS HFS HFS HFS HFS HFS HFS HFS S1 Bends radius <500m - carriageway with one-way traffic 0.45 50 55 60 60 65 65 68+ 68+ HFS HFS 0.5 68+ 68+ 68+ HFS HFS HFS HFS HFS HFS HFS S2 Bend radius <500m - carriageway with two-way traffic 0.45 50 55 60 60 65 65 68+ 68+ HFS HFS 0.5 68+ 68+ 68+ HFS HFS HFS HFS HFS HFS HFS 0.55 HFS HFS HFS HFS HFS HFS HFS HFS HFS HFS