High-performance steel fibre reinforced concrete (HPFRC) exhibit potential for widespread application in bridge construction. This material enables the use of high levels of prestress, potentially resulting in a substantial reduction in the required amount of concrete and mild steel reinforcement. This material-saving feature is complemented by a notable enhancement in durability properties compared to a conventional concrete. However, despite these potential advantages, the utilization of this material in bridge construction remains uncommon. This paper presents a cost-effective tailored mix design for HPFRC to be potentially used in construction of bridge deck. Next, this specific mix is compared with other literature-found fibre reinforced concrete in terms of Global Warming Potential. Next, the study approaches the broader application of this material by evaluating a 60 m span U-girder deck constructed with HPFRC. This proposal is then compared with two box girder bridges of similar specifications, and another U-girder, constructed using conventional concrete. The comparative analysis emphasizes the critical importance of assessing Global Warming Potential within the broader structural system rather than solely at the material level. Notably, despite HPFRC’s relatively high embodied carbon, this is counterbalanced by the significant reductions in concrete and mild steel reinforcement, rendering it an environmentally promising option for bridge construction.