Gollnick said:
Portland, Oregon would be the worst.

Youve got a huge frickin river on yer doorstep. Ya wanna evacuate Portland quickly,
..learn ta swim!!!!
If you take a look at the US Census:
US Municipalities Over 50,000:
Ranked by 2000 Population you would see what a daunting task this is. Evacuating 1.8 million people from most of Houston, our 4th largest city with nearly four times the population of New Orleans, along with Galveston (pop. 57,247), Beaumont (pop. 113,866) and coastal cities and towns from Port Aransas to Port Charles was done with comparatively few problems and the obvious stumbling blocks opening I-45S to northbound traffic and fuel will be addressed. You cannot foretell every problem and have a viable contingency plan for it but you do learn from mistakes and oversights. Also, Texas has
not been neglecting its transportation infrastructure. The Trans-Texas corridor currently in the planning stages will no doubt enjoy positive press and government impetus in the months following Rita and Katrina that it needs for passage. There is still resistance from both environmental interests and property owners (but thats another political thread).
Population density plays a larger role in evacuations of large cities than mere gross population figures and here I doubt a real solution is possible. the best one could hope for is maximum advance warning. In high density cities with geophysical limitations such as San Francisco with few exits and an equally dense outlying metro area, a decent public transportation evacuation plan is not just an option it is an absolute requirement. Should any of the BART tunnels or the Golden Gate, SF to Oakland Bay, Dunbarton, or Hayward bridges fail however, they will be swimmin with Gollnick.
This also points out why it is important to develop local and state plans and exercise, exercise, exercise. By exercising the plan though I am not being so impractical as to try and evacuate a city as a regular matter of course. Even the best logisticians use table-top scenarios and computer simulations as essential components in their planning. Mass casualty and city emergency exercises need to be done on a regular basis and should have oversight from state and federal evaluators.
But beyond this, why even evacuate for hurricanes?
Living in Japan, I went through numerous typhoons including a couple of Super Typhoons (sustained winds >130 kts). In the Pacific where typhoons are year round phenomena and there have already been 20 named typhoons in 2005, Japan experienced two Cat IV typhoons this month with relatively minor impact, minimal loss of life, no general panic, and no emergency evacuations on the magnitude seen here. Why??? Could planning and intelligent building codes play a major role??
The sea wall systems in Japan are designed to distribute the force of normal tidal flows and, to an extent, lessen the impact of storm surges. Houses are built mostly with reinforced concrete bases and walls to withstand winds and surge. Windows are reinforced and often shuttered with firmly anchored steel roll-up covers. In low lying areas, the same construction applies but unlike most of our Gulf and Atlantic coasts, houses are often built with an open lower floor design and the living areas are on the 2nd story. They also do not build on the shifting sands with a floating slab as we often do and instead drive their supports to bedrock for stability.
Costly?? Maybe. But its more effective than our haphazard building codes and cost is relative when lives are at risk. I get particularly incensed at simple things like failure to use the right fasteners in roofs everywhere; failure to use established tornado hardened construction methods in Texas and the rest of tornado alley; and failure of most new builders to plan or offer tornado cellars in tornado prone areas. (California and the Pacific Coast is another bowl of nuts with its own psychotically divined construction beliefs worthy of a complete thread discussion)
Planning and preparation may not make a perfect evacuation plan but public awareness, realistic drills, continuing evaluation, and contingency options can make it workable and increase survival rates.
A wise prince ought to observe some such rules, and never in peaceful times stand idle, but increase his resources with industry in such a way that they may be available to him in adversity, so that if fortune changes it may find him prepared to resist her blows.
- Nicolo Machiavelli ---