Transport Minister Rita Saffioti has outlined the investment of $22m for four rail siding extensions for CBH grain bins at Moora, Brookton, Cranbrook and Broomehill, $46m for seven additional grain rail siding upgrades at Avon, Kellerberrin, Dowerin, Konnongorring, Ballidu, Mingenew and Perenjori North and $60m for upgrading the Midland line from 16 tonne axle loading (TAL) to 19 TAL between Carnamah and Mingenew.