(TASR) - CT.gov
(TASR) - CT.gov (TASR) - CT.gov
HEADING DESCRIPTIONS FOR THE TRAFFIC ACCIDENT SURVEILLANCE REPORT (TASR) The TASR contains traffic accident rates for two types of locations: SPOTS which are either intersections with another highway or a segment between intersections less than 0.1 of a mile in length; and, SECTIONS which are either segments between intersections greater than 0.1 mile in length or interchange areas and between interchange areas on expressways. ROUTE FROM MILE TO MILE TOWN NO. LANDMARK SIG RU RDTY - ROUTE NUMBER - BEGINNING MILEAGE POINT - ENDING MILEAGE POINT - TOWN NUMBER - LOCATION DESCRIPTION - TRAFFIC SIGNAL INDICATOR (0 - NO SIGNAL PRESENT; 1 - SIGNAL PRESENT) - INDICATES WHETHER THE LOCATION IS IN A RURAL OR URBAN AREA (1 - RURAL; 2 - URBAN) - ROADWAY TYPE 1, 2, 3 - NORMAL HIGHWAY WITH 1, 2 OR 3 LANES 4 - 4 LANE UNDIVIDED, UNLIMITED ACCESS 5 - 4 LANE DIVIDED, UNLIMITED ACCESS 6 - SERVICE ROAD 7 - TRAFFIC CIRCLE 9-16 - EXPRESSWAY 20 - TRANSITION 22 - MISCELLANEOUS INTY - INTERSECTION TYPE 0 - BETWEEN INTERSECTIONS 1 - INTERSECTIONS WITH STATE ROADS 2 - INTERSECTIONS WITH TOWN ROADS 3 - BETWEEN INTERCHANGES OF AN EXPRESSWAY 4 - INTERCHANGE AREAS OF AN EXPRESSWAY 5 - SIGNALIZED PRIVATE DRIVE (SHOPPING CENTER, BUSINESS, INDUSTRY, ETC.) ACCS - NUMBER OF ACCIDENTS
HEADING DESCRIPTIONS FOR THE TRAFFIC ACCIDENT SURVEILLANCE REPORT (TASR) -2- VEHICLES - THE NUMBER OF VEHICLES PASSING THROUGH THE LOCATION. OBTAINED BY MULTIPLYING THE AVERAGE DAILY TRAFFIC BY THE NUMBER OF DAYS IN 3 YEARS. MILLION VEHICLE MILES - MILLION VEHICLE MILES OF TRAVEL. OBTAINED BY MULTIPLYING THE NUMBER OF VEHICLES BY THE SEGMENT LENGTH. (RAV) AVG. ACC. RATE (RA) ACT. ACC. RATE (RC) IMPROB. ACC. RATE RA/RC LISTED ON SLOSSS - AVERAGE ACCIDENT RATE FOR TYPE OF LOCATION. EXPRESSED IN ACCIDENTS PER MILLION VEHICLE MILES OF TRAVEL FOR “SECTIONS”; AND, IN ACCIDENTS PER MILLION VEHICLES FOR “SPOTS”. - ACTUAL ACCIDENT RATE FOR THAT LOCATION. EXPRESSED IN ACCIDENTS PER MILLION VEHICLE MILES OF TRAVEL FOR “SECTIONS”; AND, IN ACCIDENTS PER MILLION VEHICLES FOR “SPOTS”. - THE CRITICAL ACCIDENT RATE FOR THAT LOCATION. DETERMINED BY THE RATE-NUMBER QUALITY CONTROL METHOD AND EXPRESSED IN ACCIDENTS PER MILLION VEHICLE MILES OF TRAVEL FOR “SECTIONS”; AND, IN ACCIDENTS PER MILLION VEHICLES FOR “SPOTS”. - THE RATIO OF THE ACTUAL ACCIDENT RATE (RA) TO THE CRITICAL ACCIDENT RATE (RC). - IF THE RA/RC RATIO IS GREATER THAN 1.0 AND THE NUMBER OF ACCIDENTS IS GREATER THAN OR EQUAL TO THE MINIMUM (15), THEN A “YES" APPEARS AND THE LOCATION IS INCLUDED IN THE SUGGESTED LIST OF SURVEILLANCE STUDY SITES (SLOSSS).
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HEADING DESCRIPTIONS FOR THE TRAFFIC ACCIDENT SURVEILLANCE REPORT<br />
(<strong>TASR</strong>)<br />
-2-<br />
VEHICLES<br />
- THE NUMBER OF VEHICLES PASSING THROUGH THE<br />
LOCATION. OBTAINED BY MULTIPLYING THE AVERAGE<br />
DAILY TRAFFIC BY THE NUMBER OF DAYS IN 3 YEARS.<br />
MILLION VEHICLE<br />
MILES<br />
- MILLION VEHICLE MILES OF TRAVEL. OBTAINED BY<br />
MULTIPLYING THE NUMBER OF VEHICLES BY THE<br />
SEGMENT LENGTH.<br />
(RAV) AVG.<br />
ACC. RATE<br />
(RA) A<strong>CT</strong>.<br />
ACC. RATE<br />
(RC) IMPROB.<br />
ACC. RATE<br />
RA/RC<br />
LISTED ON<br />
SLOSSS<br />
- AVERAGE ACCIDENT RATE FOR TYPE OF LOCATION.<br />
EXPRESSED IN ACCIDENTS PER MILLION VEHICLE<br />
MILES OF TRAVEL FOR “SE<strong>CT</strong>IONS”; AND, IN<br />
ACCIDENTS PER MILLION VEHICLES FOR “SPOTS”.<br />
- A<strong>CT</strong>UAL ACCIDENT RATE FOR THAT LOCATION.<br />
EXPRESSED IN ACCIDENTS PER MILLION VEHICLE<br />
MILES OF TRAVEL FOR “SE<strong>CT</strong>IONS”; AND, IN<br />
ACCIDENTS PER MILLION VEHICLES FOR “SPOTS”.<br />
- THE CRITICAL ACCIDENT RATE FOR THAT LOCATION.<br />
DETERMINED BY THE RATE-NUMBER QUALITY CONTROL<br />
METHOD AND EXPRESSED IN ACCIDENTS PER MILLION<br />
VEHICLE MILES OF TRAVEL FOR “SE<strong>CT</strong>IONS”; AND,<br />
IN ACCIDENTS PER MILLION VEHICLES FOR “SPOTS”.<br />
- THE RATIO OF THE A<strong>CT</strong>UAL ACCIDENT RATE (RA) TO<br />
THE CRITICAL ACCIDENT RATE (RC).<br />
- IF THE RA/RC RATIO IS GREATER THAN 1.0 AND THE<br />
NUMBER OF ACCIDENTS IS GREATER THAN OR EQUAL<br />
TO THE MINIMUM (15), THEN A “YES" APPEARS AND<br />
THE LOCATION IS INCLUDED IN THE SUGGESTED LIST<br />
OF SURVEILLANCE STUDY SITES (SLOSSS).
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