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Modern Geomatics Technologies and Applications

Test Cases 1 Programs 291
Massport 1 453
Administrative 1 Sidewalk Cover /… 525
Hero Square Sign 1 711
Consumer Affairs… 2 Disability 862
Participatory… 5 1329
Metrolist 6 Abandoned Bicycle 1666
Current Events 7 14 Notification 1716
311 non-emergency service requests Parking Complaints 18 33 311 non-emergency service requests Administrative &… 2564
1828
Bridge Maintenance
2210
15
Billing
Health
2538
16
Air Pollution Control
Valet
4868
Neighborhood…
21
5392
Generic Noise…
21
8064
Environmental…
MBTA
22
9262
Administration
31
Employee &…
9295
12200
Office of The…
35
Recycling
15812
Noise Disturbance
41
Alert Boston
17787
Trees
Fire Department
22989
Cemetery 39 56 Building 16691
60
23952
Pothole 74 31405
Water Issues 112 Code Enforcement 38930
Weights and… 140 60286
Boston Bikes 170 Enforcement &… 64472
General Requests 183 71114
Investigations and… 188 Street Cleaning 93937
0 50 100 150 200 0 50000 100000
Frequency Frequency

Fig 4. Statistics of Citizens requests reports.

TABLE 2 DISCOVERED ACCIDENT RULES BASED ON CRASH CHARACTERISTICS
NO Antecedent => Consequent (crash) C% L≥1
1 Pedestrian, Exempt => Street crash, Weekday 79 2.54
2 Street => Pedestrian crash, Weekday 100 2.41
3 Pedestrian, Weekday => Street crash 100 2.41
4 Pedestrian, Residential => Street crash 100 2.41
5 Pedestrian, Noon, Weekday => Street crash 78 2.41
6 Bike, Weekday => Intersection crash 100 1.99
7 Intersection, Exempt, Weekend => Motor Vehicle crash 84 1.18
8 Intersection, Residential => Motor Vehicle crash, weekday 81 1.13
9 Intersection, Exempt => Motor Vehicle crash 80 1.12
10 Intersection, Noon => Motor Vehicle crash 80 1.12
11 Intersection => Motor Vehicle crash 80 1.12
12 Intersection, Night => Motor Vehicle crash 80 1.11
13 Intersection, Residential, Weekday => Motor Vehicle crash 80 1.11
14 Intersection, Commercial => Motor vehicle crash 79 1.11
15 Motor Vehicle, Commercial, Weekday => Intersection crash 61 1.21
6