According to analysts' forecasts, which I think are too low, the stock is trading at a 6.9% free cash flow yield on 2028 numbers. For a business that should be able to raise price ahead of inflation and grow volumes, that is way too low.
Every year that the company hikes price at inflation + 0.5%, it's EBIT grows at inflation + 1%, and free cash flow by around inflation + 1.2-1.3%.
Every time volumes go up by 1%, EBIT should grow by roughly 1.4-1.7%, given that incremental volumes come with very high EBIT margins, closer to 70%. Every time EBIT grows by 1.4-1.7%, free cash flow to the equity grows by around 2%.
So if you assume that pricing = inflation + 0.5% per annum, and volume growth = 0.5% per annum, starting in 2029, then you have EBIT growing at inflation + 1.7%, and free cash flow at inflation + 2%+ per annum.
So assuming analysts' forecasts for 2028 are correct, and the company can grow volumes at 0.5% per annum, and pricing at inflation + 0.5% per annum, your forward rate of return should be inflation + 8.6% per annum.
In my opinion, the company will meaningfully outperform analysts' forecasts, and the stock is probably trading at a 9%-9.5%+ free cash flow yield to the equity on 2029 numbers, and will probably grow free cash flow after that at inflation + 2-3% per annum. You are also getting potential environmental tailwinds for free, and upside from increase in highway taxes.