Hydrogen is seen as a promising clean fuel for heavy-duty trucking, but its current cost at refuelling stations in California is significantly higher than the target price for rapid adoption. While production accounts for only 15% of the cost at the pump, the remaining 85% is attributed to running the pump station and distribution. To achieve the $5/kg target, focus needs to shift towards cutting costs in delivery and refuelling. Initiatives like densifying hydrogen at lower costs, reducing transportation distances, and increasing production volumes can help drive down the overall cost. Investments in hydrogen production facilities and technologies like electrolysis startups are vital to make hydrogen economically viable. The article highlights the importance of addressing the entire hydrogen supply chain to minimize costs and enable its competitiveness with diesel in sectors like heavy-duty transportation and steel production. By investing in reducing hydrogen delivery costs, innovating in densification technologies, and expanding production locations and fuelling stations, the aim is to unlock economic parity with diesel and accelerate the uptake of hydrogen in decarbonising various industries.