Engineering for Elderly Mobility Best Practices Michigan · 2016-02-26 · Engineering for Elderly...
Transcript of Engineering for Elderly Mobility Best Practices Michigan · 2016-02-26 · Engineering for Elderly...
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Engineering for Elderly Mobility
Best Practices
Michigan
Dave MorenaFHWA Michigan Division
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12 Inch Blades9 Inch lettering Rochester Hills
Widely used:
Rochester HillsAuburn HillsWyoming
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Widely used:
City of Detroit (CBD)Ingham CountyWyoming
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City of Detroit - Street Name Signs
NEW - 6” ClearviewHigh Intensity Sheeting
OLD - 5 3/8” Hwy Series D Engineering Grade Sheeting
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Common Michigan practice
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Ingham County, MI:
• 2-way to 4-way Stop conversions• remove sheeting after two years
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Advance Lane Assignment
Lansing, MI
Ground-mounted signs& markings
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Advance Lane Assignment
M-43Lansing
Overhead signs
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Troy, MI
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Suburban
M-43
Troy
Rural - MDOT statewide
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Advance Street Name- supplemental plaques
Ingham County, MI - all roads, 1980+
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Use of supplemental warning sign for two-way stop-controlled sites,
based on: crash experience, restricted sight distance, change in control
Troy
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Farmington Hills:
RPMs on all Major Roads
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Paint on rumble
Paint on pavement
Michigan pilot: 100+ freeway miles
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Large beads
in urethane marking
MI Counties are experimenting:
Otsego, Mackinaw, Schoolcraft, Wexford…
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Large Bead STATESLarge Bead STATES
ID
MT NDMN
SDWY
OR
CANV
UT
CO
NE
KS
IA
AZNM
TXOK
MO
AR
LA
MSAL
TN
FL
GA
SC
NC
KY
VA
IL INOH
WV
MDDE
PANJ
NY
CT
VT
ME
NH
RIWI
MI
WA
MA
10-2004
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Comparison photo
Lansing, MI
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Pavement Marking Extension –Edge Line
MDOT – all exit ramps
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Pavement Marking Extension –Intersection
Lansing
Common use at large intersections - many MI agencies
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Oakland County - annually paints 9 intersections
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Webberville, MI
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Webberville, MI
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Webberville, MI
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to inter
sectio
n
800 f
t
M-43“RIGHT TURN LANE ONLY
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Make Signals More Conspicuous
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Recent conversions:• Lansing• Detroit (on-going) • Grand Rapids• Port Huron•
Michigan MUTCD now requires 12” for new signals
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Michigan users:• Oakland County• MDOT•••
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Washtenaw County:Back plates on all mast arms
(25 intersections)Detroit:
Interested in reflectorized yellow back plates
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Daytime Signal - Conspicuity
Lansing:
black face yellow heads
Traditional MI practice:
yellow face yellow heads
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Place Signal Heads Where Motorists Will
See Them
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One Signal Face per Lanecentered over each lane
Grand Rapids, MI
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Far-side Signals:BOX SPAN
Lansing
Moving to Box Span:• Port Huron• Oakland• Grand Rapids• Lansing,
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Far-side Signals:MAST ARM
Washtenaw County 25 of 75 intersections
have mast arms
Wyoming - converts 2 intersections/ yr
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Troy
Common use: Oakland, Macomb, Troy, Detroit
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Michigan DOT - two signals overhead
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Signal Operation
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MDOT and most MI agencies have adopted ITE all-red standard
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for permissive left turn
protectedpermissive
Livingston County: new standard for permissive signals
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Anything you do to simplify the operation of an intersection,
particularly the demands on left turn traffic,
is an elderly mobility countermeasure.
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Woodward Ave. corridor- Detroit
• reposition signal heads• 12” signal heads• add supplemental signals • add all-red
33locations
Total CrashReductions
by Age
25-64 17%65+ 31%
Injury CrashReductions
by Age
25-64 4%65+ 35%
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13 intersections whereleft-turn phasing was added:
Total Crash ReductionHead-On Left Turn
by Age
25-64 66%65+ 73%
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Separate the right turn traffic
Michigan DOTMuskegon TSC
Wide shoulderWide shoulder
Wide shoulder allows drivers to exit mainline, then slow and make easy turn
� Right turn taper
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4-lane to 3-lane conversions
All LTs cross one lane only
Other Michigan agencies:
• E. Lansing• Lansing• who else
MDOT: converted xx corridors since 1995• total crashes xx %• injury crashes yy %
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MSU campus
Offset Left Turn Lanes
Cedar StLansing/Holt
Using the median
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Offset Left Turn Lanes
Livingston County
Non-median - Livingston County, Wyoming
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Offset right turn laneM-43 & M-52
Benefits to crossroad LT traffic:• sight distance• level of comfort
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45%52%
0%
10%
20%
30%
40%
50%
60%
Age Group
Allages
Over60
Injury crash reduction
45%52%
0%
10%
20%
30%
40%
50%
60%
Age Group
Allages
Over60
Injury crash reduction
MichiganIndirect Left Turn
Michigan DOT - common practice on boulevards
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Crossover design makes a difference
AFTER: Directional flow
BEFORE: Bi-directional
Injury crash reduction
Age G
Allages
32 %
Age Group
Allages
38 %
32 %
DriversOver
65
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Michigan Indirect Left Turn –narrow median
Oakland County, Grand Rapids / Kent County
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Roundabouts EliminateLeft-turn Head on Crashes
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Larger & Brighter Lights
OLD - 8” lens
NEW - 12” lensLED
Michigan DOT
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Conspicuous crossing surfacefor high volume crossings
OLD - rubber NEW - concrete
Michigan DOT practice (1998):- cheaper by 50% & RRs love it
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Crossbuck Conspicuity
OLD
• high-intensity sheeting• sheeting on post• sheeting on back of
X-buck and back of posts
NEW
Michigan DOT
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Pedestrian Accommodation at RR Crosssing
OLD NEW
Michigan DOT RR crossing policy: include sidewalk crossing as part of the project
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Countdown Pedestrian Signals
Get pics – Fernadale, Birmingham, Grand Rap
Birmingham
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Shorter & safer path
Bulb-outIsland Bulb-out
Lansing