Tonight we will be discussing accidents
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- Janice Poole
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1 Good evening PRAG members WELCOME BACK
2 SAFETY ON HANA HIGHWAY NEAR PAIA
3 Tonight we will be discussing accidents
4 Safety is a Top Priority One of the top priority Goals and objectives of this project is to improve SAFETY of the road Some Accidents can be prevented or their severity reduced through having an alternate road, by reducing congestion and by providing roadway design for multiple types of users
5 What does accident data tell us about safety?
6 Two types of Accident Data Maui Police Department accident reports between Stable Road (Spreckelsville Road) to Maliko Gulch. PRAG Member Lisa Starr requested these for the year 2003 to current. Paia Main Street Association also has similar reports for State of Hawaii Traffic Division has done an analysis for the past three years between Haleakala Road and Maliko Gulch. The State data is for accidents with damage over $3000 or with bodily injury or death.
7 Number of Accidents Listed on Maui Police Department Reports
8 Accident Rates This is a measure of the number of accidents for every 100 miles of total vehicle travel
9 Accident Rates for State of Hawaii for every 100 million vehicle miles travelled
10 Accident Rates Maui County for every 100 miles of vehicle travelled State
11 Accident Rates for Hana Highway by Section, SECTION AVERAGE RATE MAUI AVG STATE AVG Haleakala Road to Kahului side of Paia town Paia town Paia Town to Holomua Road Holomua Road to Maliko Road
12 High Accident Location Between mileposts the accident rate for the three year average was more than twice the state average, and nearly fifty percent higher than the Maui County average accidents per 100 million miles
13 The accident rate between Paia Town and Holomua Road is higher than either Maui County or State of Hawaii averages The accident rate in Paia Town is higher than the State of Hawaii average Other sections are reasonably below the County and the State average
14 Let s keep this from being an average trip to the beach
15 Presentation to Paia Relief Road Advisory Group on Traffic Forecasts for Hana Highway and an Alternate Route at Paia August 24, 2009 Prepared by PB Americas, Inc
16 Hana Highway 24-hour Counts, Kahului Side of Baldwin Ave :00 AM 1:00 AM 2:00 AM 3:00 AM 4:00 AM 5:00 AM 6:00 AM 7:00 AM 8:00 AM 9:00 AM 10:00 AM 11:00 AM 12:00 PM 1:00 PM 2:00 PM 3:00 PM 4:00 PM 5:00 PM 6:00 PM 7:00 PM 8:00 PM 9:00 PM Volume (vehicles per hour) 10:00 PM 11:00 PM Time Hana-bound, West of Baldwin Kahului-bound, West of Baldwin Total HDOT Traffic Summary Wednesday April 23, 2003
17 Peak Hour Turning Movement Counts in Year
18 On-street Parking Maneuver Interference with Traffic Operations 4
19 Pedestrian Crossing and Vehicular Traffic Interference 5
20 Level of Service Definition The Highway Capacity Manual defines six Levels of Service (LOS), labeled A through F, from best to worst conditions. Levels of Service for signalized and unsignalized intersections are defined in terms of average user delays. LOS A: Little or no delay. LOS B: Short traffic delays. LOS C: Average traffic delays. LOS D: Long traffic delays. LOS E: Very long traffic delays. LOS F: Demand volume exceeds capacity, resulting in extreme delays with queuing that may cause severe congestion and affect other movements at the intersection. 6
21 2007 LOS and Delay (veh/sec) Hana Highway and Baldwin Avenue Weekday AM Peak Hour Weekday PM Peak Hour Weekend Peak Hour LOS Delay LOS Delay LOS Delay D 44 F 80 C 28 Makai bound Baldwin Left E 58.7 E 79.9 C 19.1 Makai bound Baldwin Right D 35.8 F D 19.0 Hana bound Hana Thru C 20.9 D 37.1 D 35.7 Hana bound Hana Right B 1.7 B 15.8 C 21.7 Kahului bound Hana Left F F D 66.3 Kahului bound Hana Thru C 29.1 B 12.9 B
22 Year 2030 Roadway Network 8
23 2030 Projected Average Daily Traffic on Hana Highway Existing 18,410 No Build 29,170 Relief Route going through Mid Paia 13,390 Relief Route going through Upper Paia 15,750 9
24 2030 Traffic Split Between Hana Highway and a Relief Route going through Mid Paia Hana Highway Relief Route going through Mid Paia Average Daily Traffic 13,386 15,784 % 46% 54% 10
25 2030 Traffic Split Between Hana Highway and a Relief Route going through Upper Paia Hana Highway Relief Route going through Upper Paia Average Daily Traffic 15,754 13,416 % 54% 46% 11
26 2030 Hana Highway and a Relief Route going through Upper Paia LOS Analysis 2030 LOS and Delay (veh/sec) Hana Highway and Baldwin Avenue AM PM LOS Delay LOS Delay C 25.0 C 33.5 Makai bound Baldwin Left D 39.7 D 42.4 Makai bound Baldwin Right C 28.9 D 53.7 Hana bound Hana Thru C 21.9 D 37.9 Hana bound Hana Right B 18.8 B 17.4 Kahului bound Hana Left D 40.8 D 55.0 Kahului bound Hana Thru B 17.8 B
27 Mahalo! 13
28 Roadway Design Guiding Documents
29 Influencing Factors Functional Classification Streets or highways are grouped into classes according to the character of traffic service Three highway functional classifications: Arterial Roads higher mobility low degree of access Collector Roads balance between mobility and access Local Roads lower mobility high degree of access
30 Examples of Functional Categories F Freeway Rural Arterial
31 Urban Collector Local street
32 Role of Functional Classification in the design process Functional Classification Design Speed Cross Section Horizontal and Vertical alignment Sight Distances Intersections Right of Way width Lane widths Drainage
33 Influencing Factors Traffic Volume and Composition Average Daily Traffic (ADT) Is the basic measure of traffic demand Determined through traffic counts Peak Hour Traffic ( PHV) Reflects the busiest 1-hour period of the day Usually rush-hour hour volume with morning and afternoon peaks
34 Influencing Factors Traffic Volume and Composition Composition of Traffic Vehicle types, sizes and weights have different operating characteristics (climbing hills, stopping and starting distances etc) Two general classes Passenger cars all cars, vans, pick up trucks etc. Trucks all buses, trucks and recreational vehicles Usually expressed as a percentage of trucks
35 Influencing Factors Design Speed Represents the maximum driving speed, when all other conditions are favorable. Choice of design speed will depend on terrain, land use and functional classification Design speed is higher than posted speed or running speed Directly influences design factors such as: Horizontal curves Vertical curves Superelevation Sight distances
36 Influencing Factors Safety Considerations Most significant factor is access control Minimize driver decisions and reduce unexpected situations Errant vehicle collisions (roadside design) Clear Zone steep slopes fixed objects Pedestrian and cyclist movements and accessibility
37 Influencing Factors Topography Ideal design should follow the general terrain and existing drainage direction Should blend in with the natural surroundings Generally try to balance the amount of cut and fill
38 Influencing Factors Cost and Available Funds Obtain maximum benefit Balance objectives/options with potential costs Construct the project in phases to match available funding
39 Influencing Factors Social and Environmental Considerations Must include human, animal and plant communities Road should be located to complement its environment Environmental variables must be given full consideration
40 Cross Section Elements Cross section Typical 2 lane undivided Highway
41 2 lane undivided
42 2 lane undivided
43 Bicycle and Pedestrian Facilities
44 Shared-use path Within separate right-of-way Supplements the roadway bicycle network Can include scenic or recreational opportunities 10 to 12 ft wide
45 Every project is unique Must consider the setting and character of the area Must consider the values and needs of the community
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