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4 2 12 Work Session Materials_9th St. to 11th St. One-Way to Two-Way ConversionMasterpiece on the Mississippi TO: The Honorable Mayor and City Council Members FROM: Michael C. Van Milligen, City Manager Dubuque bierd All-America City 1 2007 SUBJECT: Work Session - April 2, 2012 - 5:30 p.m. 9th Street & 11th Street: One -Way to Two -Way Conversion Downtown Central Business District Comprehensive Traffic Analysis DATE: March 27, 2012 City Engineer Gus Psihoyos is transmitting an outline of information to be presented by IIW, PC at the City Council Work Session on 9th Street and 11th Street: One -Way to Two -Way Conversion. Michael C. Van Milligen MCVM:jh Attachment cc: Barry Lindahl, City Attorney Cindy Steinhauser, Assistant City Manager Gus Psihoyos, City Engineer Mastopiece on the Mississippi T0: Michael C. Van Milligen, City Manager FROM: Gus Psihoyos, City Engineer Dubuque kettd All-America City 2007 SUBJECT: 9t" Street & 11t" Street: One -Way to Two -Way Conversion Downtown Central Business District Comprehensive Traffic Analysis Information for City Council Work Session DATE: March 23, 2012 INTRODUCTION This memo outlines the information IIW, PC (IIW) will present at the City Council work session scheduled for April 2, 2012 at 5:30 p.m. BACKGROUND On February 20, 2012, the City Council approved the consultant selection of IIW, PC (IIW) to perform the 9t" Street & 11th Street one -way to two -way conversion study and the comprehensive analysis of existing traffic signal timings in the Downtown Central Business District. On April 2, 2012, IIW and the City Engineering Department plan to present its preliminary findings on: — Proposed US 52 routing and corridor improvements. — Conversion of 9th Street, 11t" Street, Elm Street and Pine Street from a one-way to two -way traffic pattern. — Improvements at the Kerper Blvd, 9t" Street, and 11t" Street intersection. DISCUSSION Proposed US 52 Routing and Corridor Improvements US 52 is currently routed on a one -way pair of streets (9t" Street and 11t" Street) between Central Avenue and the Hwy 61/151 on and off ramps. 9t" Street carries east- /south -bound traffic between US 52 and US 61/151 where the US 52 southbound routing joins US 61/151. Northbound US 52 traffic exits US 61/151, and uses the E911 connector to 11 th Street which carries US 52 west /north bound traffic to White Street. The proposed Intermodal Terminal and Parking Facility will require changes to the current US 52 routing. The current site footprint of the terminal building requires the removal of the E911 connector. IIW is proposing to make US 52 routing follow 9th Street and will add US 52 routing on White Street from 9th Street to 11th Street. With 9th Street two -way, both US 52 both southbound and northbound US 52 traffic can utilize 9th Street without a need to use 11th Street. Currently 9th Street and 11th Street are one -way between Central Avenue and Kerper Blvd; Pine Street and Elm Street are one -way between 9th Street and 11th Street. All of these segments would be converted to two -way. The E911 connector would be partially removed and a portion would remain in place to serve the proposed intermodal terminal building. Traffic volumes have been studied for current year and future year (2040). In both cases the conversion of 9th Street, 11th Street, Elm Street, and Pine Street to two - way provides the capacity to carry the proposed two -way traffic with some added turn lanes and traffic signal revisions. The use of 9th Street for the routing of US 52 has been discussed with the Iowa DOT and they concur with the concept and want to see the plans for implementation prior to granting final approval. Conversion of 9th Street, 11th Street, Elm Street and Pine Street from a One -Way to Two -Way Traffic Pattern IIW and their sub consultant, Brown Traffic Control Products, have explored two alternate traffic routing plans. Currently eastbound one -way traffic uses 11th Street from Kerper Boulevard to Central Avenue, then turns left on Central Avenue for a block to 10th Street, turns right and continues eastbound on the signalized 10th Street corridor from Central Avenue to Bluff Street. Alternate A converts 9th Street and 11th Street (east of Central) to two -way operation and maintains the existing traffic routing. Alternate B provides the same one -way to two -way conversion, but changes the traffic routing plan to eliminate the jog to 10th Street and maintains traffic on 11th Street to Bluff Street. Implementing this alternate removes the left-turn traffic onto Central Avenue which is more efficient from a signal timing standpoint when the roadway is at capacity. This alternate would require additional signals to be installed on 11th Street and routes the traffic past the Library. Alternate B provides a simplified routing that will potentially provide better traffic capacity for east -west circulation. Traffic signals installed onto 11th Street would encourage this revised routing. Potentially, this rerouting could include the removal of traffic signals on 10th Street to be replaced with two -way stop signs. This would further promote rerouting of existing traffic and enhance 10th Street as a pedestrian corridor, part of the City's concept for developing this central business district. IIW has taken traffic counts of a selection of existing intersections. ECIA provided traffic forecasting for the major route segments. They are unable to provide a traffic forecast for the implementation of this change since 10th Street is not part of the model they maintain. In addition to options for signalized corridors and routing, there is also an option on how to make signal progression work in a two -way corridor. One option is to provide two - way traffic progression; this will cause vehicles moving through the corridor to stop more frequently since approximately three consecutive signals can be timed to allow two -way traffic progression. As an alternate, although the streets allow two -way traffic, the signal timing can be such that the traffic progression remains in a one -way direction, people using the routes on a regular basis would learn which corridor provides consistent green light progression in the eastbound or westbound direction. IIW and City of Dubuque Engineering propose keeping the existing signal progression east -west along 9th Street and 11th Street utilizing 10th Street west of Central Avenue and maintaining one -way signal timing progression with eastbound progression on 9th Street from Bluff Street to White Street and westbound progression on the 11th Street /10th Street corridor from White Street to Bluff Street. From the traffic study results, there is currently sufficient capacity to allow the left turn to be made from 11th Street at Central Avenue without impacting the traffic progression along Central Avenue. In essence, even though 9th and 11th streets will be converted to two -way traffic, the signal progression will remain the same (traffic will stop less frequently at traffic signals when traveling eastbound on 9th Street and when traveling westbound on the 11 th Street /10th Street corridor). As a result of converting streets from one -way to two -way, the vehicle turning movements were reviewed to determine the impact. At times semi - trucks will encroach into a traffic lane used by opposing traffic when making turns; this is typical for a downtown area. City of Dubuque Engineering has been in contact with businesses that have expressed concerns about traffic movements. Improvements at the Kerper Boulevard, 9th Street and 11th Street intersection There are two options for the transition from 9th and 11th streets at Kerper Boulevard. Two exhibits are attached that show two options being considered. Traffic modeling has shown the leg of Kerper Boulevard between Pine Street and Kerper Blvd at 11th street can be removed with enhancements to the other intersections. Removal of this segment of Kerper Boulevard will allow for the future development of the old Public Works garage so that it has access to rail and waterfront. Option A reconfigures 9th Street to require all traffic to turn left at Pine Street and use 11th Street to access Kerper Blvd. Kerper Boulevard would be removed from Pine Street to Kerper Blvd at 11th street. Pine Street would also have a right turn lane at 11th Street to accommodate expected traffic volumes. This layout is estimated to cost $295,000. Option B creates a cross -over connection at Kerper Boulevard at 11th street. This option allows for Kerper Boulevard to remain between Pine Street and Kerper Blvd at 11th street until a need develops for the removal of Kerper Boulevard for the old public works garage. The cost for this option is estimated to be $140,000. Engineering recommends Option B. Cost estimates for the complete conversion of traffic on 9th and 11th from one -way to two -way are not available at this time. IIW, P.C. and city engineering staff will get the information from the City Council work session and a scheduled public information session scheduled for April 3, 2012 before giving a final construction estimate. ACTION TO BE TAKEN This information is provided for your use. Please let me know if you have any questions. Prepared by Jon Dienst, P.E. cc: Julie Neebel, IIW, PC Jenny Larson, Budget Director Don Vogt, Public Works Director John Klostermann, Street & Sewer Maintenance Supervisor David Ness, Civil Engineer II Duane Richter, Engineering Technician Bill Schlickman, Traffic Engineering Assistant US 52 70 US el 4 151 mr3 EXUSSMNS "TO" ROOUTONO C XMT0NO US 52 ROUnN • • • • • •> C XMTU G ONE WAY TRAFFBC FLOWS IIW, PC I I w ARCHITECTURE CIVIL ENGINEERING CONSTRUCTION SERVICES ENVIRONMENTAL ENGINEERING LAND SURVEYING MUNIOPAL ENGINEERING STRUCTURAL ENGINEERING TRANSPORTATION ENGINEERING INTEGRITY EXPERTISE SOLUTIONS norcom 80055E EXISTING ONE WAY TRAFFIC FLOWS 00000..� I I W, PC 1 ♦♦ IIW ARCHITECTURE CIVIL ENGINEERING CONSTRUCTION SERVICES ENVIRONMENTAL ENGINEERING LAND SURVEYING MUNICIPAL ENGINEERING STRUCTURAL ENGINEERING TRANSPORTATION ENGINEERING INTEGRITY EXPERTISE SOLUTIONS US 81 /151 /52 US Gi 0 us 31/151 PROPOSED US 52 G°3OUTONG C X SSUOVSO ONE WAY T AFF C FLOWS PROPOSED TWO WAY TEAFFOC FLOWS OFETO0A2 US 82! A33 ROUiTSEG STAR7S HERE MODIFIED TRAFFIC FLOWS USING 9TH STREET AS HWY 52 ROUTING AND PINE STREET AS "TO" US 61/151 AND "TO" US 52 ELM ST (n x / 0 ECO CRtr(NTU SCALE NFEET FFO ti CJv w J 1 WHITE ST CENT z HEEB ST LL LL 3 Ezu, AVE CITY HALL N. MAIN ST • • ELLIS ST 7// �rN k cc 0 'i I LO UST ST ( • EXISTING SIGNALIZED INTERSECTIONS ONE WAY CONTINUOUS TRAFFIC SIGNAL PROGRESSION COLOR IDENTIFIES SYSTEM MEMBERS TWO WAY CONTINUOUS TRAFFIC SIGNAL PROGRESSION COLOR IDENTIFIES SYSTEM MEMBERS GROVE TERRACE �4 CITY OF DUBUQUE EXISTING DOWNTOWN SIGNAL INSTALLATIONS • . GEOMETRY ALTERNATE 1 (n (c LOCUST T BLUFF ciF•v�o� ug,u,�uut uu twagw TrulFlc Products. Inc. lil AFlY6 lflOY1lIOA, I!(XY11P611 f(AN(I J IIW ARCHITECTURE CM. ENGNEERNG CaR51101.IC71. EFHVCES 1.01100010010. ENGNEFIR :G NGNcoMMY!G u ENGN EEJ G NlS i Pp TAtNENGNEERNG WHITE ST CENT ELM ST WASH I4GTON S1 0 0 JACKSON ST 19 InOFC M GNTPIEGLNFFE� sot 44_ J z HEEB ST 2 LL 3 SHELBY S MEP ,L!, •E MAIN ST II PR % AVE CITY HALL N. MAIN ST ELLIS ST 0 / N\ • EXISTING SIGNALIZED INTERSECTIONS ONE WAY CONTINUOUS TRAFFIC SIGNAL PROGRESSION COLOR IDENTIFIES SYSTEM MEMBERS TWO WAY CONTINUOUS TRAFFIC SIGNAL PROGRESSION COLOR IDENTIFIES SYSTEM MEMBERS LO UST ST CO o III. �\ ilk TRAFFIC SIGNAL DEMOLITION • PROPOSED TRAFFIC SIGNAL 3 BLUFF ST GROVE TERRACE 1 CD co 7 CO ANL x BLUFF E J CITY OF DUBUQUE EXISTING DOWNTOWN SIGNAL INSTALLATIONS GEOMETRY ALTERNATE 2- \.4.41-15/0014, `P . 4:71044 t � � <Je .- � r _ mI CITY DUBUQUE aelwE TIOHk Products, loc. I EIIUINYl. I!Effl106t I tttPItI nRCHITECTURE CNL EWNEERNG EI w G . EN uw . GIOEFOIG ExCNEERNG i 81SPO TAIONE HUMNG P: \10\ 041\ 041 -05\ DRAWINGS \CIVIL \10041- 05_ZZ- OPTIONS EXHIBIT AND PRELIM QTO.DWG 3/22/2012 1:23:15 PM CODY AUSTIN PROJECT NUMBER ‘4:4164 11TH ST yr' Ook ss■sa ■ssss I a us■ ax 1 DRAV.ING MAY HAVE BEEN REDUCED It HORIZONTAL SCALE IN FEET 0 50 100 11TH ST 04 f 4a u • • a 9TH ST Jt � a Design For 9TH STREET AND 11TH STREET ONE WAY TO TWO WAY CONVERSION • PAVING OPTION A Station: Date:2012 CITY OF DUBUQUE DESIGNED BY: DETAILED BY: TRACED BY: CHECKED BY • f 563.556.2454 • ♦ 800.556.4491 "� IIW, P.C. • www.iiwengr.com CITY OF DUBUQUE PROJECT NUMBER STATE FED. ROAD DIST. NO. FISCAL YEAR SHEET N0. TOTAL SHEETS IOWA 12 EX1 P: \10\ 041\ 041 -05\ DRAWINGS \CIVIL \10041- 05_ZZ- OPTIONS EXHIBIT AND PRELIM QTO.DWG 3/22/2012 1:23:30 PM CODY AUSTIN PROJECT NUMBER 4:4 Lig 04 Aa NINR•-i ^ lawiliesioria HORIZONTAL SCALE IN FEET 0 50 100 DRAWING MAY HAVE BEEN REDUCED 11TH ST r• o-. .l r <>S7 At 4 a Design For 9TH STREET AND 11TH STREET ONE WAY TO TWO WAY CONVERSION PAVING OPTION B Station: Date:2012 CITY OF DUBUQUE DESIGNED BY: DETAILED BY: TRACED BY: CHECKED BY jiw 563.556.2464 • 800.556.4491 IIW, P.C. • www.iiwengr.com CITY OF DUBUQUE PROJECT NUMBER STATE FED. ROAD DIST. NO. FISCAL YEAR SHEET N0. TOTAL SHEETS IOWA 12 EX2