McClintock And Warner Wreck

There is nothing remarkable about this intersection; it is a prototypical arterial-arterial signalized intersection like many others in the Phoenix Metro area — this one is in the City of Tempe. Both streets are high-speed (45mph posted maximum limit); with two through lanes, a bike lane in each direction; in addition each approach the bike lane discontinues ~ 250′ from the intersection where the space flares to become  a dedicated right turn only lane, additionally all approaches have a dedicated right turn only lane. The signal is timed, and there is a demand, leading, left turn arrow on all approaches.

The wreck pictured above (8/13/2019) is typical; two motor vehicle collided, one driver was turning left and ran into a driver going straight ahead. For whatever reason, it took over an hour to clear up; causing significant delays for at least hundreds of other motorists. (on top of all that, construction on Loop 101 is thought to be adding additional volume in the area).

As things turn out, there are about 28 collisions per year at this intersection. Virtually all of them involve only motor vehicles; there were a total of only 1 pedestrian, and 4 bicyclist collisions reported over a 10 year period.
Here’s one from a few years ago at same corner — this one was a “single vehicle” crash. It seems that not all drivers are driving safely. The manner of collision is broken down below, the most commonly-reported type is rear-end; indicating driver-inattention is a serious problem. Left turns are the 2nd leading manner, this type of driver-error is associated with high speeds coupled with driver-misjudgment.

Flipped vehicle: NE corner Warner and McClintock, Tempe.

Over the 10 year period there were a total of 166 motorist injuries, and 4 non-motorist (i.e. either a pedestrian or a bicyclist; i didn’t check which was which) injuries.

For more general info about Collision in the City of Tempe see here, there are also links there to traffic counts which I haven’t looked up.

:

IncidentYear count(*)
2009 21
2010 29
2011 28
2012 24
2013 27
2014 33
2015 36
2016 33
2017 27
2018 23
count(*)
281
sF_Bicycle sF_Pedestrian count(*)
0 0 275
0 1 1
1 0 5
SUM(TotalMotoristsFatalities) SUM(TotalNonMotoristsFatalities) SUM(TotalMotoristsInjuries) SUM(TotalNonMotoristsInjuries)
0 0 166 4
eInjurySeverity count(*)
NO_INJURY 200
POSSIBLE_INJURY 39
NON_INCAPACITATING_INJURY 36
INCAPACITATING_INJURY 6
eCollisionManner count(*)
SINGLE_VEHICLE 9
ANGLE_FRONT_TO_SIDE 48
LEFT_TURN 82
REAR_END 99
HEAD_ON 4
SIDESWIPE_SAME_DIRECTION 23
SIDESWIPE_OPPOSITE_DIRECTION 3
REAR_TO_SIDE 1
REAR_TO_REAR 1
OTHER_97 7
UNKNOWN_99 4

.

SELECT IncidentYear, count(*) FROM incident i LEFT OUTER JOIN LOVCity ON i.CityId = LOVCity.id 
WHERE ( (OnRoad LIKE "%mcclintock%" AND CrossingFeature LIKE "%warner%") OR (OnRoad LIKE "%warner%" AND CrossingFeature LIKE "%mcclintock%") ) 
AND IncidentYear > 2008 AND IncidentYear < 2019 
GROUP BY 1;

SELECT count(*) FROM incident i LEFT OUTER JOIN LOVCity ON i.CityId = LOVCity.id 
WHERE ( (OnRoad LIKE "%mcclintock%" AND CrossingFeature LIKE "%warner%") OR (OnRoad LIKE "%warner%" AND CrossingFeature LIKE "%mcclintock%") ) 
AND IncidentYear > 2008 AND IncidentYear < 2019 ;

SELECT sF_Bicycle, sF_Pedestrian, count(*) FROM incident i LEFT OUTER JOIN LOVCity ON i.CityId = LOVCity.id 
WHERE ( (OnRoad LIKE "%mcclintock%" AND CrossingFeature LIKE "%warner%") OR (OnRoad LIKE "%warner%" AND CrossingFeature LIKE "%mcclintock%") ) 
AND IncidentYear > 2008 AND IncidentYear < 2019 
GROUP BY 1, 2;

SELECT SUM(TotalMotoristsFatalities), SUM(TotalNonMotoristsFatalities),
SUM(TotalMotoristsInjuries), SUM(TotalNonMotoristsInjuries) FROM incident i LEFT OUTER JOIN LOVCity ON i.CityId = LOVCity.id 
WHERE ( (OnRoad LIKE "%mcclintock%" AND CrossingFeature LIKE "%warner%") OR (OnRoad LIKE "%warner%" AND CrossingFeature LIKE "%mcclintock%") ) 
AND IncidentYear > 2008 AND IncidentYear < 2019 ;

SELECT eInjurySeverity, count(*) FROM incident i LEFT OUTER JOIN LOVCity ON i.CityId = LOVCity.id 
WHERE ( (OnRoad LIKE "%mcclintock%" AND CrossingFeature LIKE "%warner%") OR (OnRoad LIKE "%warner%" AND CrossingFeature LIKE "%mcclintock%") ) 
AND IncidentYear > 2008 AND IncidentYear < 2019 
GROUP BY 1;

..

Other statistical notes: not all 281 were at the intersection; in some cases it was the closest cross-streets

Leave a Reply

Your email address will not be published. Required fields are marked *