Week14a - Traffic Calming Urban Transportation Planning MIT...

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Traffic Calming Urban Transportation Planning MIT Course 1.252j/11.380j Fall 2002 Mikel Murga, MIT Research Associate Dec 6, 2002
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2 Urban Transportation Planning – Fall 2002 Fri Dec 6 Table of Contents ! Why traffic calming? ! Traffic calming, how? ! Techniques ! Design Criteria ! The Process
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3 Urban Transportation Planning – Fall 2002 Fri Dec 6 Why Traffic Calming? ! The faster you go, the higher the probability of an accident, as: ! Your vision focus narrows with speed ! For a given reaction time, distance covered is proportional to speed ! The faster you go, the longer the stopping distance
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4 Urban Transportation Planning – Fall 2002 Fri Dec 6 Why Traffic Calming? ! The faster you go, the higher the seriousness of an accident ! For instance, the kinetic energy of an automobile (1.2 tons at 35 mph) is at least 150 times higher than for a pedestrian (180 pounds) at 3 mph ! Such a collision at: ! 20 mph, means bone fractures and concussions ! Between 20-30 mph, medium seriousness ! More than 30 mph, very high probability of either death or permanent disability
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5 Urban Transportation Planning – Fall 2002 Fri Dec 6 Why Traffic Calming? ! To avoid segregation of public spaces and maintain its livability ! Underpasses, skywalks and other “solutions”, do not provide “eyes on the street”
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6 Urban Transportation Planning – Fall 2002 Fri Dec 6 Traffic Calming: How? ! When you drive at 30 mph, you tend to focus your sight far ahead ! And you narrow the sight area ! You fail to see the surroundings
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7 Urban Transportation Planning – Fall 2002 Fri Dec 6 Traffic Calming: How? ! But if you drive at 20 mph, you start to see what lies on the sides
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8 Urban Transportation Planning – Fall 2002 Fri Dec 6 Traffic Calming: How? ! The basic idea is to
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This note was uploaded on 12/06/2011 for the course ESD 11.380j taught by Professor Fredsalvucci during the Fall '02 term at MIT.

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Week14a - Traffic Calming Urban Transportation Planning MIT...

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