Performance Measures-Maintenance Operations
Bare Pavement System
Final Report
For the Winter 2001/2002
Prepared By: Bob Heidrich
Maintenance Office
July 2002
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Bare Pavement System-Final Report 2001/2002
Introduction
As part of the Ministry’s Performance Measuring Project, the Maintenance Office considered numerous measures in the summer of 1997. After presentation of identified measures to Management Board and to the Maintenance Operations Committee, the decision to accept the length of time to clear highways after winter storms was made.
This lead to the development of the Bare Pavement System (BPS) designed to capture the required information. The BPS implementation in the fall of 1997 consisted of system development, testing and staff training.
A final report was completed in August 1998 on results achieved during the 1997/98 winter and the recommendation to change the percentage used to determine lost and regained bare pavement from 50% to 90% was adopted for the 1998/99 winter season.
Bare Pavement System
The Bare Pavement System captures the required information to provide the length of time required to reach bare pavement after winter storms. This consists of a data collection sheet which records the time and date a storm begins and ends, the time and date bare pavement is lost and regained and the type of storm.
This information is captured by patrol/highway for all storms. The data collection sheets are sent to the District Offices for inputting into the Bare Pavement module of MMIS. From this database, reports can be generated. Information obtainable from these reports are the length of storms, amount of time bare pavement is lost, average time to regain bare pavement and the number of events by type.
The information can be sorted by highway and patrol, class of highway and type of storm.
Implementation Notes
The Bare Pavement System (BPS) was introduced to MMIS Coordinators or nominated District custodians of the system in September 1997. At this time, they were explained the concept and process and the computer software required for data input was installed on their workstation. A new database was created on each District DDIS server to accept the new information.
The responsibility of gathering the information was deemed to be that of the patrol supervisor. Completion of Bare Pavement information was also added to existing and upcoming Area Maintenance Contracts.
In 2001 the bare pavement system became a module within MMIS.
2001/2002 Data
A quick review of the District databases was conducted in February 2002 to ensure the data was captured accurately by MO areas and AMC contractors and accurately inputted into the databases. Some corrections were made to obvious errors but overall, the data seemed consistent with participation by all areas. Bare Pavement data follows the MMIS data acceptance process to ensure data integrity.
The data presented in this report include the provincial average time to regain bare pavement on Class 1, 1B, 2 and 3 highways and District averages by patrol. Also provided is the average percentage of time the service level class standard was met and exceeded.
The number of events recorded increased from 4,810 in 1999-2000 to 8,244 in 2000-2001 due to a severe winter in many areas, enhanced training on the system and increased participation. The total events for 2001/2002 is 5995 which reflects a mild winter.
Chart #1
Chart #1 shows the average length of time to regain bare pavement on Class 1 highways by District. The 2001-2002 provincial average was 2.3 hours. Of the 8 Districts reporting, 4 were below the provincial average and 4 above the average.
Chart #2
Chart #2 shows the average length of time to regain bare pavement on Class 1B highways by District. The 2001-2002 provincial average was 3.5 hours. Of the 10 Districts reporting, 6 were below the provincial average and 4 were above the average.
Chart #3
Chart #3 shows the average length of time to regain bare pavement on Class 2 highways by District. The 2001-2002 provincial average was 5.1 hours. 4 of the 6 Districts reporting were below the provincial average and 2 were above the provincial average.
Chart #4
Chart #4 shows the average length of time to regain bare pavement on Class 3 highways by District. The 2001-2002 provincial average was 6.5 hours. 2 districts where below the average while 2 districts were above the average however, New Liskeard was only slightly above the provincial average.
Chart #5
Chart #5 shows the percentage of time bare pavement was achieved prior to the end of the storm, within the class standard of 8 hours and over the 8 hour standard for all Class 1 highways.
Provincially, bare pavement was achieved prior to the end of the storm in 15.8% of the time. This average was inflated by a 32.7% average in Chatham, 47.4% in London and 32.9% in Owen Sound.
Bare Pavement was achieved within the class standard 95.8% of the time. Bare pavement was not achieved within the class standard 4.2% of the time.
This chart also shows the percentage of events on Class 1 highways.
Chart #6
Chart #6 shows the percentage of time bare pavement was achieved prior to the end of the storm, within the class standard of 16 hours and over the 16 hour standard for all Class 1B highways.
Provincially, bare pavement was achieved prior to the end of the storm in 18.2% of the time. This average was inflated by a 39.7% average in London.
Bare pavement was not achieved within the class standard in 2.7% of the time. This equates to a 97.3% average of time bare pavement was regained within the 16 hour standard.
This chart also shows the percentage of events on Class 1B highways.
Chart #7
Chart #7 shows the percentage of time bare pavement was achieved prior to the end of the storm, within the class standard of 24 hours and over the 24 hour standard for all Class 2 highways.
Provincially, bare pavement was achieved prior to the end of the storm in 13.8% of the time.
Bare pavement was not achieved within the class standard 7.1% of the time. This equates to a 92.9% average of time bare pavement was regained within the 24 hour standard.
This chart also shows the percentage of events on Class 2 highways.
Chart #8
Chart #8 shows the percentage of time center bare pavement was achieved prior to the end of the storm, within the class standard of 24 hours and over the 24 hour standard for all Class 3 highways.
Provincially, bare pavement was achieved prior to the end of the storm in 17.3% of the time.
Bare pavement was not achieved within the class standard in 7.8% of the time. This equates to a 92.2% average of time center bare pavement was regained within the 24 hour standard.
This chart also shows the percentage of events on Class 3 highways.
Chart #9
Chart # 9 shows the percentage of time bare pavement was achieved within the level of service Class Standard for all highway classes by District. This is the performance measure provided to Management Board annually. The target for the 2001-2002 was set at 90%. The provincial average for 2001-2002 is 95.2%.
This chart also shows the percentage of events on all highways for each district.
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Chart #1
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Chart #2
Chart #3
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Chart #4
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Chart #5
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Chart #6
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Chart #7
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Chart #8
Chart #9
Central Region
All highways in Central Region are classified as Class 1. The Region average to regain bare pavement for 2001-2002 for Class 1 was 2.6 hours which is 0.3 hour above the provincial average of 2.3 hours. The Region percentage of time bare pavement was regained within the Class Standard of 8 hours was 95%.
There were major variances among patrol averages for number of events, average length of events, average length bare pavement was lost and average time to regain bare pavement.
383 events were recorded in Central Region. This represents 30.2% of all class 1 events in the province and 6.4% of all events in the province. The patrol average in Central region is 47 events per patrol.
The average length of an event was 10.1 hours and on average, bare pavement was lost for 11.3 hours.
Observations
1) Patrols 6 recorded 3 events, which is well below the Region average of 47.
2) Patrol 2 recorded 75 events, which is well above the Regional average of 47.
3) Patrol 6 average time to regain bare pavement is 4.2 hours, which is above the Regional average. This is attributed to recording only 3 events of which 1 exceeded the Class Standard of 8 hours. Patrol 8 also had 3 events exceed the class standard, which increased their average time to regain bare pavement.
London District
All highways in London District are classified as Class 1 or Class 1B. The District average to regain bare pavement for 2001-2002 for Class 1 was 0.6 hours, which is 1.7 hours below the provincial average of 2.3 hours. The District average for Class 1B was 1.2 hours which falls 2.3 hours below the provincial average of 3.5 hours. The District percentage of time bare pavement was regained within the Class Standard of 8 hours for Class 1 Hwys was 99.4%. The District percentage of time bare pavement was regained within the Class Standard of 16 hours for Class 1B Hwys was 99.1%.
There were some major variances among patrol average length of an event, number of recorded events and average length of time bare pavement was lost for both Class 1 and Class 1B highways.
263 events or 4.4% of all provincial events were recorded in London District equating to an average of 32 events per patrol. 154 events were recorded on Class 1 highways and
109 events were recorded on Class 1B highways representing 12.2% of Class 1 events and 4.1% of Class1B events.
The average length of an event was 18.7 hours and on average, bare pavement
was lost for 16.8 hours.
Observations
1) The following patrols were well below the average number of events for London District: Patrol 4A – 2 Events
Patrol 04 – 3 Events
Patrol 11 – 1 Event
Chatham District
All highways in Chatham District are classified as Class 1 or Class 1B. The District average to regain bare pavement for 2001-2002 for Class 1 was 0.6 hours which falls 1.7 hours below the provincial average of 2.3 hours. The District average for Class 1B was 1.1 hours which falls 2.4 hours below the provincial average of 3.5 hours. The District percentage of time bare pavement was regained within the Class Standard of 8 hours for Class 1 Hwys was 100%. The District percentage of time bare pavement was regained within the Class Standard of 16 hours for Class 1B Hwys was 100%.
There were major variances in the number of recorded events.
117 events or 2% of all provincial events were recorded in Chatham District equating to an average of 29 events per patrol. 68 events were recorded on Class 1 highways and
49 events were recorded on Class 1B highways representing 5.4% of Class 1 events and 1.8% of Class1B events.
The average length of an event was 8 hours and on average, bare pavement
was lost for 7.7 hours.
Observations
1) Patrol 1 recorded 4 events for Class 1 highways and 4 events for Class 1B highways for a total of 8 events. This is well below the district average of 29 events per patrol.
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Owen Sound District
All highways in Owen Sound District are classified as Class 1 or Class 1B. The District average to regain bare pavement for 2001-2002 for Class 1 was 3.3 hours which is 1 hour above the provincial average of 2.3 hours. The District average for Class 1B was 3.6 hours which is 0.1 hours above the provincial average of 3.5 hours. The District percentage of time bare pavement was regained within the Class Standard of 8 hours for Class 1 Hwys was 91.7%. The District percentage of time bare pavement was regained within the Class Standard of 16 hours for Class 1B Hwys was 97.5%.
There were major variances among patrol averages to regain bare pavement on Class 1B highways from a low of 0 to a high of 6.9 hours.
There were some major variances among patrol events.
364 events or 6.1% of all provincial events were recorded in Owen Sound District equating to an average of 30 events per patrol. 120 events were recorded on Class 1 highways and
244 events were recorded on Class 1B highways representing 9.5% of Class 1 events and 9.1% of Class1B events.
The average length of an event was 19.6 hours and on average, bare pavement
was lost for 21.8 hours.
Observations
1) The following patrols were well below the average number of events per patrol:
Patrol 8 – 11 Events
Patrol 9 – 16 Events
Patrol 10 – 7 Events
Patrol 23 – 1 Event
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Ottawa District
Highways in Ottawa District are classified as Class 1, 1B or 2. The District average to regain bare pavement on Class 1 highways for 2001-2002 was 2.2 hours which falls 0.1 hour below the provincial average of 2.3 hours. The District average for Class 1B highways was 1.8 hours which falls 1.7 hours below the provincial average of 3.5 hours. The District average for Class 2 highways was 2.6 hours which falls 2.5 hours below the provincial average of 5.1 hours. The District percentage of time bare pavement was regained within the Class Standard of 8 hours for Class 1 Hwys was 96.5%. The District percentage of time bare pavement was regained within the Class Standard of 16 hours for Class 1B Hwys was 95.7%. The District percentage of time bare pavement was regained within the Class Standard of 24 hours for Class 2 Hwys was 98%.