Asphalt composition

An asphalt modifier comprising a polyester resin and a hydrocarbon-based compound (i), wherein

• the polyester resin has a structural unit derived from an alcohol component and a structural unit derived from a carboxylic acid component, wherein the carboxylic acid component contains at least one succinic acid compound selected from the group consisting of an alkylsuccinic acid and an alkenylsuccinic acid, and
• the asphalt modifier has a glass transition point between −70° C. and 30° C.

A method for producing an asphalt composition, comprising:

• in the presence of a hydrocarbon compound (i), subjecting an alcohol component and a carboxylic acid component to a polycondensation reaction to obtain a polyester resin composition, wherein the carboxylic acid component contains at least one succinic acid compound selected from the group consisting of an alkylsuccinic acid and an alkenylsuccinic acid;
• and
• mixing an asphalt and the polyester resin composition.