Funny, but that's usually my line and I look at TEN year trends, not two or three.
Too many things happen over the span of ten years to be able to pin any given result on any given one-time shock ten years prior. The HTA172 one-time shock happened in Sept 2007. There was an immediate effect that some attribute to other causes. If the other supposed causes quickly go away and the original situation does not return, it is reasonable to attribute the improvement to the one-time shock.
The other supposed causes did in fact go away with no rebound effect to the fatality rate. Now we have a fresh shock happening in the form of a 35% spike in the price of fuel this year. If the theory of some here is correct that the previous drop in fatality rates was in part due to reduced discretionary travel because of high fuel prices, then we should be able to look forward to another significant drop in fatality rates. If we do not get that drop, then that casts doubt on the previously-held premise that fuel prices were at least partly behind the drop.
I just looked at the ORSAR numbers for 2003 through 2007. Overall there's a slight increase in fatalities on Friday through Sunday as compared to weekday rates, but nothing approaching a "spike". Also, let's not forget when prime drinking and driving time is for a significant part of the population - Friday night through Sunday afternoon. That may also be a good part of the reason for difference.Didn't we also go 'round and 'round on this one, where ultimately a post was made showing that there is a spike in accidents on weekends, and the days on either side of them? Feel free to peruse our past MASS of discussions on the matter
If recreational travel is a factor as you claim, then the 2008 ORSAR numbers when released should show a significant shift in weekend fatality rates vs weekday rates. I don't see any significant shift happening.
Also, recall that gasoline consumption fell by only 1% in 2008. If there was reduced discretionary travel, how much was that travel reduced? Is it realistic to attribute the massive drop in fatality rate on an incremental decrease in travel?
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