A bituminous emulsion comprising: (a) from 60 to 75% by weight based on the emulsion of a dispersed phase comprising, based on a total of 100% of bitumen and component (d), from 98.5 to 96% by weight bitumen and from 1.5 to 4% by weight component (d); (b) from 40 to 25% by weight based on the emulsion of an aqueous phase comprising water; (c) one or more emulsifier systems; and (d) a block copolymer composition comprising (i) a diblock copolymer comprising one block of a monovinylaromatic hydrocarbon and one block of a conjugated diene having a peak molecular weight from 30,000 to 78,000, a monovinylaromatic hydrocarbon content from 23 to 37%, and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, and (ii) optionally a block copolymer comprising at least two blocks of monovinylaromatic hydrocarbon and at least one block of conjugated diene, the block copolymer selected from linear triblock copolymers having a peak molecular weight that is 1.5 to 3.0 times the peak molecular weight of the diblock copolymer, multiarm coupled block copolymers having a peak molecular weight that is 1.5 to 9.0 times the peak molecular weight of the diblock copolymer, and mixtures thereof, wherein each block copolymer has a monovinylaromatic hydrocarbon content from 23 to 37%, and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, wherein the ratio of (i) to (ii) in the block copolymer composition is greater than 1:1, wherein a blend of bitumen and component (d) may be heat treated prior to being mixed with the emulsifier system at a temperature ranging from 175 to 220°C for a period of time about 4 hours to 30 hours, in which case the content of component (d) is less than 3% by weight. (a) from 60 to 75% by weight based on the emulsion of a dispersed phase comprising, based on a total of 100% of bitumen and component (d), from 98.5 to 96% by weight bitumen and from 1.5 to 4% by weight component (d); (b) from 40 to 25% by weight based on the emulsion of an aqueous phase comprising water; (c) one or more emulsifier systems; and (d) a block copolymer composition comprising (i) a diblock copolymer comprising one block of a monovinylaromatic hydrocarbon and one block of a conjugated diene having a peak molecular weight from 30,000 to 78,000, a monovinylaromatic hydrocarbon content from 23 to 37%, and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, and (ii) optionally a block copolymer comprising at least two blocks of monovinylaromatic hydrocarbon and at least one block of conjugated diene, the block copolymer selected from linear triblock copolymers having a peak molecular weight that is 1.5 to 3.0 times the peak molecular weight of the diblock copolymer, multiarm coupled block copolymers having a peak molecular weight that is 1.5 to 9.0 times the peak molecular weight of the diblock copolymer, and mixtures thereof, wherein each block copolymer has a monovinylaromatic hydrocarbon content from 23 to 37%, and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, (i) a diblock copolymer comprising one block of a monovinylaromatic hydrocarbon and one block of a conjugated diene having a peak molecular weight from 30,000 to 78,000, a monovinylaromatic hydrocarbon content from 23 to 37%, and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, and (ii) optionally a block copolymer comprising at least two blocks of monovinylaromatic hydrocarbon and at least one block of conjugated diene, the block copolymer selected from linear triblock copolymers having a peak molecular weight that is 1.5 to 3.0 times the peak molecular weight of the diblock copolymer, multiarm coupled block copolymers having a peak molecular weight that is 1.5 to 9.0 times the peak molecular weight of the diblock copolymer, and mixtures thereof, wherein each block copolymer has a monovinylaromatic hydrocarbon content from 23 to 37%, and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block,