SLIDE 1
Dan Erva, P.E. - WisDOT Fred McCue - WisDOT Andy Dana, P.E. - Ayres Associates Kevin Kuhlow, P.E. - Ayres Associates
2
December 12, 2017 5:30 to 7 p.m. Rhinelander City Hall Dan Erva, - - PowerPoint PPT Presentation
December 12, 2017 5:30 to 7 p.m. Rhinelander City Hall Dan Erva, - - PowerPoint PPT Presentation
December 12, 2017 5:30 to 7 p.m. Rhinelander City Hall Dan Erva, P.E. - WisDOT Fred McCue - WisDOT Andy Dana, P.E. - Ayres Associates Kevin Kuhlow, P.E. - Ayres Associates 2 Identified needs Proposed alternatives/solutions
SLIDE 2
SLIDE 3
Identified needs Proposed alternatives/solutions Next steps Questions
3
SLIDE 4
Pavement is deteriorating Crash history
- Right-angle crashes for left-turning
vehicles
- Merging from free-flow, right turn
slip ramps
4
SLIDE 5
5
Crash Severity Year Fatality Injury Property Damage Only Total 2012 2 7 9 2013 1 1 6 8 2014 2 6 8 2015 2 6 8 2016 6 6 Total 1 7 31 39
SLIDE 6
6
Crash Type Total Angle 18 Rear End 12 Run Off the Road 6 Side Swipe 2 Overturn 1 Total 39
SLIDE 7
Signalized intersection with offset, left-
turn lanes
Roundabout No build
7
SLIDE 8
8
SLIDE 9
Reduces the risk of severe crashes by shifting left-
turn lanes to improve visibility
Replaces free-flow, right-turn lanes with
channelized right-turn lanes
Relocates or closes median openings Does not meet standards for turn bay length and
design speed
Continues need for traffic signal maintenance Raises the grade of the intersection Provides bicycle accommodations
9
SLIDE 10
10
SLIDE 11
Significantly reduces the number of conflict points Lowers the severity of crashes Increases the efficiency, causing less delay in
traffic movement
Eliminates traffic signal maintenance Reduces speed of vehicles entering the
roundabout
No access modifications Raises the grade of the intersection Provides bicycle accommodations
11
SLIDE 12
Level of Service (LOS)
- LOS A = Free flow with minimal conflicts
(0-10 second delay)
- LOS B = Stable operation with minimal delays
(10-20 second delay)
- LOS C* = Lane changing restricted by other vehicles
(20-35 second delay)
- LOS D* = Approaching unstable flow with sudden slow downs
(35-55 second delay)
- LOS E = Unstable operation at Capacity
(55-80 second delay)
- LOS F = Gridlock, demand exceeds capacity
(greater than 80 second delay)
* represents typical design LOS
12
SLIDE 13
13
Year Improved Signal Roundabout 2019 B A 2039 C B
Level of Service (LOS)
SLIDE 14
14
Alternative Cost
Roundabout $2 million to $2.5 million Signalized intersection $3 million to $3.6 million
SLIDE 15
Public input received by - December 30,
2017
Announce preferred alternative - early
2018
Environmental Document completed -
early 2018
Finalize design - summer 2018 Construction currently scheduled - 2019
15
SLIDE 16
Dan Erva, P.E., WisDOT Project Manager
- (715) 365-5776
- Daniel.Erva@dot.wi.gov
Andy Dana, P.E., Consultant Project
Manager
- (920) 327-7826
- DanaA@AyresAssociates.com
16
SLIDE 17
17