Forum Discussion
paulj
Aug 24, 2013Explorer II
bob_nestor wrote:
..
The Romans in ancient times built roads that are still in use today. ...
In use, in what sense? As walking paths? for chariots and marching legions? or 40' RVs?
Recently crews installing new water lines in a Seattle suburb uncovered buried logs, evidently part of logging road laid across a swampy area. The wood was still in good shape, so they chose to leave them (except for cutting a trench for the pipe). So in a sense that old corduroy road is still in use today. But that doesn't mean it is functionally adequate for today's traffic.
Even if they had built Interstates in the the late 1950s with a '100 yr lifespan' in mind, it does not mean they would be adequate for current traffic loads, much less today's safety standards.
Germany had, around WW2 days 3000 km of autoban. Now it has 12,000km.
http://en.wikipedia.org/wiki/German_autobahns
Most sections of Germany's autobahns are modern, containing two or three lanes in addition to an emergency lane (hard shoulder). A few other sections remain in an old state, with two lanes, no emergency lane, and short slip-roads and ramps.
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