Is Transurban’s (ASX:TCL) grip on Sydney roads set to tighten?

Transurban Group (ASX: TCL) is Australia’s largest toll-road operator. By a long shot. The company is now the 10th largest company on the S&P/ASX 200 Index (ASX: XJO). Even though Transurban shares are down 1.3% today to $14.77, the company still has a market capitalisation of $40.5 billion.

Now Transurban is already a company with a market position of dominance. It owns or at least has stakes in 17 motorways around the country, as well as another 4 in the United States and Canada. The 17 Australian tollways are spread across Melbourne, Brisbane and Sydney. Transurban’s Brisbane roads include the Gateway and Logan motorways. Its Melbourne roads are the Western Link and the Southern Link.

But it’s Sydney that is the real crown…