Comment and Information for 2001 Durham Counts:

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General Notes for All Stations:
  1. All automatic count stations have been counted with FHWA 13-class vehicle classification and grouped into the cordon count categories. Under this classification scheme, which is based on vehicle length, the light truck category is overestimated compared to manual count stations because personal trucks cannot be separated out from commercial trucks. Buses are also overestimated compared to manual count stations because they cannot be totally separated out from some larger medium trucks or smaller heavy trucks.
  2. For automatic count stations, passenger vehicle counts are proportioned into automobile occupancy categories. Using a sample of manual count stations with relatively low traffic volumes, the proportions were derived from the average percentage share of automobiles for the A.M. and P.M. peak hours (equal to 0.81, 0.16, 0.02, and 0.01 for Auto1, Auto2, Auto3 and Auto4, respectively).
  3. For automatic count stations, all buses are considered to be school buses, and occupancies are based on the average occupancies recorded at a sample of manual counted stations with relatively low traffic volumes.
  4. Database has been modified to reflect traffic volume in 15-minute ending times.
  5. Cab drivers and truck drivers are NOT included in person counts.
  6. 2001 counts were conducted from 6:00 to 19:30 (i.e., 6:00 A.M. to 7:30 P.M.).

 

Specific Notes by Station Number:
StationComments
01.01 Periods starting from 17:16 to 19:30 inclusive have been estimated, based on the percentage increase/decrease of each mode for all other time periods between the previous count year (1996) and 2001.
02.02 Period starting from 18:31 to 18:45 has been estimated for northbound traffic only, based on the previous and following time periods.
04.03 This station was counted on Friday, May 18. The General Motors assembly plant is not in operation the Friday before a long weekend. The volumes counted are likely less than on a normal workday.
04.04 Periods starting from 16:46 to 19:30 inclusive have been estimated, based on the percentage increase/decrease for all modes for all other time periods between the previous count year (1996) and 2001.
05.03 Periods starting from 16:31 to 19:30 inclusive have been estimated, based on the percentage increase/decrease for all modes for all other time periods between the previous count year (1996) and 2001.
05.04 Periods starting from 6:01 to 12:45 inclusive were counted on Tuesday, May 22. Periods starting from 12:46 to 19:30 were counted on Tuesday, September 25.
11.01 Station is situated where Durham-York-Toronto Boundary screenlines cross Regional Road 30. Stations on screenlines 26, 27, and 28 are located east of the Durham-Toronto Boundary, while stations on screenlines 29 and part of 30 are located west of the Durham-York Boundary (and were counted by York Region).
11.03 Poorly maintained road with approximately 3 dwelling units. Traffic estimate based on 1998 automatic count without any changes.
11.04 Period starting from 11:16 to 11:30 has been estimated, based on the previous and following time periods. Counts in the period starting from 12:46 to 16:30 were originally counted for both directions on one set of count sheets. This data was split into two directions based on the ratio of other parallel roads in the area.
11.05 Poorly maintained road leading to a seasonal road, with approximately 4 farm dwellings. Its use is limited to non-commuting local traffic. Traffic estimate is based on 3 occupied dwellings and very limited deliveries for farm purposes.
12.02 Newly realigned road. Traffic estimate based on 1998 manual count without any changes.
13.01 Traffic estimate based on 1996 automatic count without any changes.
14.01 A.M. periods were counted on Tuesday, June 14; P.M. periods were counted on Tuesday, May 29. The change of date for the A.M. count should not affect the results.
22.00 Same count location as station 55.04, which has been superseded. Count data for that station has been preserved as historical count data for 22.00.
28.03 Period starting from 18:16 to 18:30 has been estimated for westbound traffic only, based on the previous and following time periods.
28.06 Periods starting from 6:01 to 12:00 inclusive have been estimated for eastbound traffic only. Estimates for these periods are based on the percentage share of westbound traffic for each modal category to the total in 2001. The total number of westbound vehicles in 1998 for each 15-minute time period was multiplied by the modal percentages and multiplied by the 1998-2001 growth rate of westbound total vehicles.
40.06 Period starting from 19:16 to 19:30 has been estimated for eastbound traffic only, based on the previous time period.
49.01 Periods starting from 6:01 to 6:45 have been estimated for eastbound traffic only, based on the westbound 1996 to 2001 growth trend for the same periods. Periods starting from 7:01 to 12:30 have been estimated for auto occupancy for westbound traffic only, based on the 1996 auto occupancy ratios. Periods starting from 6:01 to 12:45 were counted on Thursday, May 24 for the right and left lanes of traffic in the eastbound direction only; the centre lane of traffic in the eastbound direction was counted on Thursday, May 17.
52.04 Same count location as station 24.05, which has been superseded. Count data for that station has been preserved as historical count data for 52.04.
53.24 There are approximately 7 dwelling units on this street, which has 3 accesses to major roads (via 2 perpendicular streets which intersect Highway 7, and Mill Street which intersects Simcoe Street). Traffic estimate based on at least one dwelling unit which primarily uses Brock Street for external travel.
53.25 There are approximately 13 dwelling units on this street, which has 3 accesses to major roads (via 2 perpendicular streets which intersect Highway 7, and Mill Street which intersects Simcoe Street). Traffic estimate based on approximately 4 of the dwelling units which primarily use Mill Street for external travel.
56.07 Poorly maintained road with approximately 5 farm dwellings. Its use is limited to non-commuting local traffic, comprising a "T" intersection at the Manvers-Scugog Townline. Traffic estimate is based on 5 occupied dwellings and very limited deliveries for farm purposes.
57.09 Periods starting from 14:46 to 19:30 inclusive have been estimated, based on the A.M. count data for the opposite direction. This station is situated on a road with very low traffic volume.
58.02 Poorly maintained road which comprises a "T" intersection with Cold Springs Camp Road. Traffic estimate based on very limited local use.
63.01 This station is situated where the Durham-York-Toronto Boundary screenlines cross Regional Road 30. Stations on screenlines 29 and part of 30 (up to and including Regional Highway 47) are located east of the Durham-York Boundary (and are counted by York Region), while stations on the remainder of screenline 30 are located east of the Durham-York Boundary.


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