sedan
07-01-2006, 02:33 AM
Friday, June 30, 2006 - Page updated at 12:00 AM
U.S. interstate system turns 50
By Sadia Latifi
McClatchy Newspapers
WASHINGTON — There's a lot to celebrate about the U.S. interstate highway system, which turned 50 Thursday.
For one thing, here's the number of traffic lights on its 47,000 miles: zero. For another, here's the minimum lane width: 12 feet. And the minimum right-shoulder width: 10 feet. Those are three reasons interstates, mile for mile, are twice as safe as all other U.S. roads.
Here's more on the country's main arteries, which President Eisenhower championed as a means of moving military materiel quickly from coast to coast:
• Interstates make up 1 percent of total U.S. road miles, but they carry one-quarter of all traffic and 40 percent of all truck traffic.
• About 60,000 people ride over the average mile of interstate highway daily.
• Pre-interstate, drivers could cover about 250 miles in a dawn-to-dark day on the road. Interstates doubled that.
• Why do interstates feel more congested these days? Because they are. In the past 10 years, their traffic volume increased 29 percent. Total interstate lane miles increased 4 percent in the same period.
• Interstates today have a fatality rate of about 1 per 100 million vehicle miles. That compares with 2 per 100 million vehicle miles on other roads. Curved exit ramps (versus right-angle turns) and minimum speeds get much of the credit.
• Feel hemmed in by trucks when you're on interstates? That's logical. Freight distribution by truck has been growing 12 percent a year since 1956.
• What state has no interstates? Alaska. Hawaii has highways that are considered interstates because they're paid for out of the same federal fund and built to the same standards, but they're designated with an H instead of an I.
• Which cities have the worst interstate access? Buffalo, N.Y.; Dover, Del.; Fresno, Calif.; Jefferson City, Mo.; Myrtle Beach, S.C.; and Tulsa, Okla., according to the Federal Highway Administration.
http://seattletimes.nwsource.com/html/nationworld/2003095289_interstatekr30.html
U.S. interstate system turns 50
By Sadia Latifi
McClatchy Newspapers
WASHINGTON — There's a lot to celebrate about the U.S. interstate highway system, which turned 50 Thursday.
For one thing, here's the number of traffic lights on its 47,000 miles: zero. For another, here's the minimum lane width: 12 feet. And the minimum right-shoulder width: 10 feet. Those are three reasons interstates, mile for mile, are twice as safe as all other U.S. roads.
Here's more on the country's main arteries, which President Eisenhower championed as a means of moving military materiel quickly from coast to coast:
• Interstates make up 1 percent of total U.S. road miles, but they carry one-quarter of all traffic and 40 percent of all truck traffic.
• About 60,000 people ride over the average mile of interstate highway daily.
• Pre-interstate, drivers could cover about 250 miles in a dawn-to-dark day on the road. Interstates doubled that.
• Why do interstates feel more congested these days? Because they are. In the past 10 years, their traffic volume increased 29 percent. Total interstate lane miles increased 4 percent in the same period.
• Interstates today have a fatality rate of about 1 per 100 million vehicle miles. That compares with 2 per 100 million vehicle miles on other roads. Curved exit ramps (versus right-angle turns) and minimum speeds get much of the credit.
• Feel hemmed in by trucks when you're on interstates? That's logical. Freight distribution by truck has been growing 12 percent a year since 1956.
• What state has no interstates? Alaska. Hawaii has highways that are considered interstates because they're paid for out of the same federal fund and built to the same standards, but they're designated with an H instead of an I.
• Which cities have the worst interstate access? Buffalo, N.Y.; Dover, Del.; Fresno, Calif.; Jefferson City, Mo.; Myrtle Beach, S.C.; and Tulsa, Okla., according to the Federal Highway Administration.
http://seattletimes.nwsource.com/html/nationworld/2003095289_interstatekr30.html