Scribd
Upload
97 views5 pages

Accident Analysis

The document provides formulas for calculating accident rates and severity ratios for highway segments and intersections based on traffic data and accident records. It includes several problems requiring the application of these formulas to determine accident rates and severity ratios for specific highway sections over defined time periods. The document presents data for various years and traffic conditions to facilitate these calculations.

Uploaded by

Teemo Yasuo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
97 views5 pages

Accident Analysis

The document provides formulas for calculating accident rates and severity ratios for highway segments and intersections based on traffic data and accident records. It includes several problems requiring the application of these formulas to determine accident rates and severity ratios for specific highway sections over defined time periods. The document presents data for various years and traffic conditions to facilitate these calculations.

Uploaded by

Teemo Yasuo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 5

Accident Analysis

▪ Accident rates for 100 million vehicle miles of travel (HMVM) ▪ Severity Ratio
for a segment of a highway:
𝑓+𝑖
𝑆𝑒𝑣𝑒𝑟𝑖𝑡𝑦 𝑟𝑎𝑡𝑖𝑜 =
𝐴(100,000,000) 𝑓+𝑖+𝑝
𝑅=
𝐴𝐷𝑇 × 𝑁 × 365 × 𝐿 𝑓 = fatal
𝑅 = the accident rate for 100 million vehicle miles
𝑖 = injury
𝐴 = the number of accidents during period of analysis
𝑝 = property damage
𝐴𝐷𝑇 = average daily traffic
𝑁 = time period in years
𝐿 = length of segment in miles

▪ Accident rates per million entering vehicle (MEV) for an


intersection.
𝐴(1,000,000)
𝑅=
𝐴𝐷𝑇 × 𝑁 × 365
𝑅 = the accident rate for one million vehicle entering vehicles
𝐴 = the number of accidents during period of analysis
𝐴𝐷𝑇 = average daily traffic entering the intersection from all legs
𝑁 = time period in years
Problem 1.

The number of accidents for 6 years recorded in a certain section of a highway is 5892. If the average traffic is 476, determine the
accident rate per million entering vehicles.
Problem 2.

It is observed that 50 traffic crashes occurred on a 20-mile-long section of Route 120 In one year. If the average daily traffic on the
section was 5500 vehicles, determine the rate of fatal crashes per 100 million vehicles-miles if 6% of the crashes involved fatalities.
Problem 3.
A 15-mile section of the Kalayaan Road had the following reported accidents for 6 years from 1992. It is required to compute the
accident rates of all accidents.

Injury Property Ave. Daily


Year Fatal Accident
Accident Damage Traffic
1992 4 46 120 10000
1993 2 52 200 10500
1994 6 70 190 11000
1995 8 65 140 11500
1996 5 82 240 12000
1997 10 98 180 12500
Problem 4.
The table shows reported accidents for a 10-mile highway section of the Diosdado Macapagal Boulevard.
Year Average Daily Property Injury Fatal
Traffic Damage Accidents Accidents
2000 20,500 165 40 5
2001 22,000 150 45 5
2002 23,500 170 50 10
2003 24,000 170 45 16
2004 25,500 160 60 19
a) Compute the severity ratio.
b) Compute the accident rate for injury accidents in HMVM.
c) Compute the accident rate in HMVM.

You might also like