Quote:
Originally Posted by Arthurgray50@blu
Yes, there is a flyover Hammersmith Broadway, but if it is maintained properly. Then it will last for years.
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The problem is that its a 50+ year old reinforced concrete structure, and the time will come in the next couple of decades where it will have to be replaced. You can't just keep patching it up indefinitely.
When that time comes, you're left with a big question, how to replace the flyover while still keeping the traffic moving. It might actually be faster and cheaper to build a replacement tunnel rather than try and replace the flyover in-situ.
Regarding tolls, that's an aside regarding how you'd finance such a scheme, especially as the A4 is now one of TfL's roads, and no longer a national transport priority.