Final Report - VHB.com

Table 2.2-3. Unsignalized Intersection Capacity Analysis Summary (continued)
2009 Existing DHV
Location/Movement Demand* Delay+ LOS^
Gurnet Road & Coombs Road (north)/Board Road
Eastbound movements from Coombs Road 10 21 C
Westbound movements from Board Road 0 0 A
Northbound movements from Gurnet Road 390 1 A
Gurnet Road & Coombs Road (south)
Eastbound movements from Coombs Road 10 15 B
Northbound movements from Gurnet Road 390 1 A
Harpswell Road & Baxter Lane/Jonathan Street
Eastbound movements from Baxter Lane 5 14 B
Westbound movements from Jonathan Street 10 12 B
Northbound movements from Harpswell Road 200 1 A
Southbound movements from Harpswell Road 275 1 A
Harpswell Road & Middle Bay Road
Eastbound movements from Middle Bay Road 120 13 B
Westbound movements from Golf Course 65 16 C
Northbound movements from Harpswell Road 205 2 A
Southbound movements from Harpswell Road 250 1 A
* Demand in vehicles per hour
+ Delay expressed in seconds per vehicle
^ Level of service
2.2.3 Crash Evaluation
A review of high crash locations (HCLs) in the Study Area was completed for the
most recent three-year period of crash data available (i.e., 2006–2008). To evaluate
whether a location is problematic, the MaineDOT utilizes two criteria to define what
is called an HCL. Both of the following criteria must be met to be classified as an
HCL:
A Critical Rate Factor (CRF) of 1.00 or more for a three-year period. A CRF
compares the actual crash rate at a specific location to the rate for similar
intersections in the state. A CRF of less than 1.00 indicates a below-average crash
rate.
A minimum of eight crashes during the latest three-year period.
Based on a review of the 2006–2008 crash records, the locations that met both criteria
were identified. In addition, the locations that met one of the two criteria and were
close to meeting the other were included in a more detailed review. For example, if an
intersection had eight crashes and a CRF of 0.95 or seven crashes and a CRF of 1.00,
that location also was included for further examination. When the locations of interest
Existing Conditions 35