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Eisenhower Blvd &Madison AveLoveland, CO

CONTINUOUS FLOW INTERSECTIONS

MATT RUDER – CITY OF LOVELAND

JEFF TEMPLE – J-U-B ENGINEERS, INC

PROJECT AREALOVELAND, CO

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INTRODUCTION TO A CFI

• DISPLACED LEFTS

• LEFTS & THROUGHS TRAVELAT SAME TIME

• INCREASED CAPACITY

TRAFFIC SIGNAL OPERATION

• LET’S DO THE MATH:

• HERE’S THE PROBLEM. AT THE INTERSECTION, SEVERAL LANES OF CARS SIT AT ARED LIGHT WHILE ONLY TWO LANES ARE MAKING LEFT TURNS WITH THE GREENARROW.

• THREE LEFT-TURN INTERSECTION OPTIONS FROM MADISON ONTO EISENHOWER:

• PRE-CFI: 14 TRAFFIC LANES TOTAL2 MADISON LEFT-TURN LANES MOVING WHILE12 OTHER LANES SIT AND WAIT (86% AT RED LIGHT)

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TRAFFIC SIGNAL OPERATION• EXPANDED CONVENTIONAL USING DOUBLE LEFT-TURN LANES IN BOTH

DIRECTIONS:17 TRAFFIC LANES TOTAL4 MADISON LEFT-TURN LANES MOVING13 LANES SIT AND WAIT (76% AT RED LIGHT)

• CONTINUOUS FLOW INTERSECTION: BECAUSE BOTH LEFT-TURN ANDTHROUGH-TRAFFIC ARE MOVING SIMULTANEOUSLY, THE NUMBERS IMPROVESIGNIFICANTLY:

18 TRAFFIC LANES TOTAL10 MADISON LEFT-TURN AND THROUGH LANES MOVING WHILE ONLY8 OTHER LANES WAIT. (44% AT RED LIGHT)

A CONTINUOUS FLOW INTERSECTION (CFI) GETS MORE CARS MOVING!

TRAFFIC SIGNAL OPERATION

MADISON/US 34 PROJECT OBJECTIVES

• REDUCE DELAY

• OPERATE SAFELY

• TRAFFIC FLOW ON US 34

• REASONABLE CONSTRUCTION COST

• BUSINESS ACCESS

• COMMUNITY ACCEPTANCE

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PLANNING & DESIGN

• OBJECTIVES OF NEW INTERSECTION:• REDUCE DELAY – MAINTAIN FLOW ON US-34

• OPERATE SAFELY

• MAINTAIN BUSINESS ACCESS

• COMMUNITY ACCEPTANCE

CONVENTIONALDOUBLE LEFT

• PRO

• USER RECOGNITION

• LIMITED ROW AREA

• CON

• LOS E ON LEFTS

• BUSINESS DAMAGE

• FULL TAKES NW/SE

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CONTINUOUS FLOWINTERSECTION

• PRO

• FITS WITH ROW

• ELIMINATES LEFT PHASE

• REMOVES CONFLICTS

• REDUCES DELAY

• CON

• UNCOMMON IN US

• BIKE PED CONCERNS

• HOW TO MODEL DELAY

• COMMUNITY ACCEPTANCE

PROJECT CHALLENGES

LEFT-TURN OFFSET

• INTRODUCING SOMETHING NEW TO THE PUBLIC

• MAKE LEFT-TURNS USER-FRIENDLY

• ALL LEFT TURNS ARE PROTECTED MOVEMENTS

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INCREASED SIGNING & STRIPING

PROJECT CHALLENGES

• CFI’S ARE SIGN INTENSIVE

• ADDED SIGNS FOR ENTRANCE INTO MALL ON NORTHEAST CORNER

• ADDITIONAL PAVEMENT MARKING FOR LEFT-TURN CROSS OVER

• ALSO ADDITIONAL SET OF TRAFFIC SIGNAL POLES

PREPARING FOR THE WORST – POWER OUTAGE/ACCIDENT

PROJECT CHALLENGES

• ADDITIONAL CABINET WITH EMERGENCY TC PLAN CONES AND SIGNS

• CLOSE DOWN CROSSOVERS

• BATTERY BACKUP FOR INTERIM OUTAGE

• PROVISIONS FOR GENERATORS

• ENTIRE ADDITIONAL BACKUP CABINET

PROJECT CHALLENGES

SNOW PLOWING• HOW TO REMOVE SNOW?

• SPECIAL TRAINING

• DEDICATED BLADE AND TRUCK FOR CFI

• DE-ICING CONDUIT & BOXES INSTALLED

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ORIGINAL PAVEMENTSECTION

MADISON/EISENHOWER CFI 10 YEARS LATER

CURRENT PAVEMENT CONDITION

• PAVEMENT HAS HELD UP WELL

• FALL 2010 – BUILT

• 2011 – PAVEMENT CONDITION INDEX (PCI) IS 92

• 2014 – PCI IS 70 TO 79

• 2017 – PCI IS 70 TO 79

• 2020 – PCI IS ABOUT THE SAME

• 2024 – PLANNED OVERLAY

MADISON/EISENHOWER CFI 10 YEARS LATER

FUTURE NEEDS• CDOT OVERLAY IN 2012, NOTHING HAS BEEN DONE SINCE. USUALLY WOULD

CHIP SEAL IN THIS TIME, BUT STRIPING COST IS TOO HIGH

• PCI OF PAVEMENT SOUTH OF INTERSECTION (~70) IS LOWER THAN THE PAVEMENTNORTH OF THE INTERSECTION (~79).

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MADISON/EISENHOWER CFI 10 YEARS LATER TRAFFIC VOLUMES

Location 2010 Volume 2018 VolumeEisenhower, east of Madison 39,450 44,950Eisenhower, east of Lincoln 33,800 41,700Boise, north of Eisenhower 11,400 13,400

2017 ACTUAL (AM/PM): 2005 ACTUAL (2030 ESTIMATE) PM:

MADISON/EISENHOWER CFI 10 YEARS LATER

CRASHES:Year Crashes Injury Crashes Year Crashes (Rank) Injury Crashes2019 20 1 2014 21 02018 27 2 2013 22 2

2017 15 3 2012 22 102016 19 4 2011 29 9

2015 16 3 2010 18 6

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