101701 PIM Boards - Idaho Falls, ID
9
17TH STREET WOODRUFF AVENUE 17 th Street and Woodruff Avenue Intersection November 2018 Welcome! Welcome! Welcome! Welcome! Thank you for your interest in this upcoming project. The purpose of this meeting is to give you an opportunity to: • Review the proposed design for the intersection of 17 th Street and Woodruff Avenue • Ask questions and provide comments
Transcript of 101701 PIM Boards - Idaho Falls, ID
17TH STREET
WO
OD
RU
FF
AV
EN
UE
17th Street and Woodruff Avenue Intersection November 2018
Welcome!Welcome!Welcome!Welcome!
Thank you for your interest in this
upcoming project. The purpose of this
meeting is to give you an opportunity to:
• Review the proposed design for the intersection of
17th Street and Woodruff Avenue
• Ask questions and provide comments
17TH STREET
WO
OD
RU
FF
AV
EN
UE
17th Street and Woodruff Avenue Intersection November 2018
Project NeedProject NeedProject NeedProject Need
Why are improvements being planned?
• Since 2002, the intersection has operated over
capacity during peak hours
• Average delays experienced by motorists traveling
through the intersection can exceed 1.5 minutes
• The intersection needs widened to improve traffic
flow, reduce congestion and accommodate
forecasted traffic growth
17th Street and Woodruff Avenue Intersection November 2018
Traffic OperationsTraffic OperationsTraffic OperationsTraffic Operations
How busy is the intersection?
Existing traffic
Forecasted traffic for 2040
5,300 vehicles enter the intersection
during the PM peak hour
4,100 vehicles enter the intersection
during the PM peak hour
• The current intersection is over
capacity – it cannot handle traffic
demand during peak travel times.
• Motorists experience 1 minute of
delay on average, and some wait 1.5
minutes or more.
• With the forecasted 30% increase in
traffic demand and without
intersection improvements,
motorists would experience nearly
2.5 minutes of delay on average, and
some could wait 4 minutes or more.
17th Street and Woodruff Avenue Intersection November 2018
SafetySafetySafetySafety
Why are safety improvements needed?
Intersection or
Roadway Segment
Total Reported
CrashesFatalities Injuries
17th and Woodruff intersection 128 0 45
17th Street segment 109 0 39
Woodruff Avenue segment 41 0 14
Crash History (2011 to 2015)
• Many of the crashes on the roadway segments are caused by vehicles
turning left into and out of driveways and unsignalized side streets.
• Raised medians have been shown to reduce crashes by 15% to 57%.(Impacts of Access Management Techniques, NCHRP 420)
• To improve safety, raised medians (shown on the next display) are
proposed on 17th Street and Woodruff Avenue.
Percentage of driveway
crashes per movement
(Access Management
Manual, Transportation
Research Board)
17th Street and Woodruff Avenue Intersection November 2018
Proposed Driveway/Side Street AccessProposed Driveway/Side Street AccessProposed Driveway/Side Street AccessProposed Driveway/Side Street Access
17TH STREET
WO
OD
RU
FF
AV
EN
UE
AU
ST
IN A
VE
NU
E
BA
LBO
A D
RIV
E
ST.
CLA
IR R
OA
D
16TH STREET
RIV
IER
A D
RIV
E
New raised median
Full Full access – All turns permitted (all
driveways are to have full access
except where noted otherwise)
RIRO Right-in/right-out access –
Only right turns permitted
Close Existing driveway is to be closed for
safety (access is available nearby)
RIRO
Full
N
RIRORIRO RIRO
RIRORIRO
Full
RIRO FullRIRO
Close
Full
RIRO
RIRO
Close
RIRO
17TH STREET
WO
OD
RU
FF
AV
EN
UE
17th Street and Woodruff Avenue Intersection November 2018
Design SelectionDesign SelectionDesign SelectionDesign Selection
How was the proposed design selected?
Several intersection options (shown on the following
displays) were evaluated, along with the option of
doing nothing, based on factors such as reduced traffic
delay, construction costs, and property and access
impacts. The results were used by the City to select
the intersection option for final design.
17th Street and Woodruff Avenue Intersection November 2018
Intersection Options EvaluatedIntersection Options EvaluatedIntersection Options EvaluatedIntersection Options Evaluated
17TH STREET
N
Conventional intersection 1This option provides two through lanes, two left-turn lanes and a
right-turn lane for each direction. This is the maximum number of
lanes for an intersection of five-lane roadways, like 17th and
Woodruff. It would provide motorists with the lowest average delay
of the conventional options but have the most property impacts.
AU
ST
IN A
VE
NU
E
WO
OD
RU
FF
AV
EN
UE
Conventional intersection 2This option is like the previous one but does not provide an
eastbound right-turn lane in order to reduce the impact to
the gas station. However, eliminating the eastbound right-
turn lane would increase the average delay experienced by
all motorists traveling through the intersection.
16TH STREET
17TH STREET
N
AU
ST
IN A
VE
NU
E
WO
OD
RU
FF
AV
EN
UE
16TH STREET
17th Street and Woodruff Avenue Intersection November 2018
Intersection Options EvaluatedIntersection Options EvaluatedIntersection Options EvaluatedIntersection Options Evaluated
17TH STREET
N
Partial thru-turn intersectionWith this innovative intersection option, northbound and
southbound left-turns are replaced with U-turns at
downstream signalized intersections. This option reduces
overall average delay but is unfamiliar to local motorists
and has major impacts to some properties.
AU
ST
IN A
VE
NU
E
WO
OD
RU
FF
AV
EN
UE
Partial continuous flow intersectionWith this innovative intersection option, northbound and
southbound left-turning motorists cross to the far side of
opposing through traffic at upstream signalized intersections.
This option has the lowest average delay and has the least
impacts but is unfamiliar to local motorists.
16TH STREET
17TH STREET
N
AU
ST
IN A
VE
NU
E
WO
OD
RU
FF
AV
EN
UE
16TH STREET
17TH STREET
WO
OD
RU
FF
AV
EN
UE
17th Street and Woodruff Avenue Intersection November 2018
Thank you!Thank you!Thank you!Thank you!
Please let us know what you think by filling
out a comment form or sending an email
What’s next?
• Public input will be reviewed and considered as the
design process continues.
• Right-of-way acquisition and final design are
scheduled for completion in 2019, with construction
currently scheduled for 2022.
