The proposed Chase Avenue and 34 Street Shared-Use Path concept plan meets the technical challenges of the location, incorporates traffic calming, and implements bicycle safety improvements at the intersection of Alton Road and Chase Avenue (see Attachment 1).
Shared Use-Path Design
As shown in Attachment 2 and detailed below, the proposed shared-use path addresses the following constructability challenges and community concerns:
- Hardscapes are minimized by the proposed 10’ width;
- Homeowner concerns are addressed by narrowing to 8’ wide adjacent to 3186 Prairie Ave.;
- Utility and light pole relocation are avoided by meandering the path;
- Shade and protection from stray golf balls are provided by new decorative shelters;
- Drainage relocation is avoided by building the path over the inlets;
- Drainage is enhanced by using porous shared use path pavement and installing bioswales;
- Miami Beach Golf Club encroachment is minimized to eight feet (8') along Chase Avenue and 0-1’ along 34 Street;
- Miami Beach Golf Club encroachment is a maximum of 18’ next to the light poles;
- Miami Beach Golf Club player experience is enhanced by new landscaping and 300’ of reconstructed golf cart path;
- No net tree loss is proposed;
- Tree relocation is proposed for 127 of 215 existing trees along Chase Avenue and 17 existing trees along 34 Street; and
- Enhanced, new landscaping is proposed which can be designed to block stray golf balls.
Traffic Calming Improvements
Traffic calming has long been a concern of the community. The Traffic Calming Study for the Central Bayshore Neighborhood was approved by the Bayshore Homeowner’s Association and subsequently by City Commission on February 17, 2017. The 2017/18 Capital Budget and G.O. bond both fund traffic calming in this community. At the October 16, 2018 public meeting, residents raised concerns with speeding and cut-through traffic. Speed data was collected, and indicated that the 85th percentile speed along Chase Avenue is approximately 34 MPH. This is four (4) MPH above the posted speed limit.
As shown in Attachment 2 and detailed below, the proposed concept plan addresses community concerns, calms traffic, reduces speeds, and reduces cut-through traffic.
- Two (2) mid-block speed tables are proposed between Chase Avenue and 34 Street.
- A traffic circle is proposed at the intersection of Chase Avenue and 34 Street.
- A two foot (2') painted buffer on the north and south sides of Chase Avenue and 34 Street will visually reduce the effective width of the roadway from a driver's perspective.
Alton Road and North Bay Road Intersection Improvements
From the onset of the study, concepts from the Alton Road and North Bay Road Intersection Bicycle Improvements Study (a TMP Priority 1 Project) were incorporated into the Chase Avenue and 34 Street design concepts.
Recommendations from this study improve safety for bicycles and pedestrians, and accommodate a new southbound left-turn movement by bicyclists. This would promote continuity for southbound bicyclists connecting to the Chase Avenue and 34 Street Shared-Use Path. This also promotes continuity for northbound bicyclists using the existing (and enhanced/ future) Alton Road Shared-Use Path on the east side of the intersection
The community supported the proposed intersection design, which includes:
- Maintaining the existing pedestrian crosswalks on the north and west legs of the intersection;
- Installing new pedestrian crosswalks on the south and east legs of the intersection;
- Installing new bicycle crossing markings for the east, south, and west legs of the intersection;
- No bike lane would be required on the north leg of the intersection, as the connecting facility to the east is on the south side of Chase Avenue;
- Installing camera detection technology for bicycles and vehicles; and
- Creating pedestrian phases at the new crosswalks.
Funding and Implementation
The City anticipates implementing both Chase Avenue and 34 Street Shared-Use Path and Bayshore Neighborhood Traffic Calming projects concurrently, given that both projects are funded in G.O. Bond Program Tranche 1.
The preliminary cost estimate for design and construction of the proposed Chase Avenue and 34 Street Shared-Use Path is $590,000. The project is included in the 2018 G.O. Bond Program (Project # 43 - Protected Bicycle Lanes and Shared Bike/Pedestrian Paths).
The preliminary cost estimate for design and construction of the proposed traffic calming improvements is $400,000. The project is included in the 2018 G.O. Bond Program (Project # 42 - Pedestrian Neighborhood Traffic Calming and Pedestrian Friendly Streets). There is also $378,075 available for traffic calming in the 2017/18 capital budget.
The estimated cost of the Alton Road and North Bay Road intersection improvements is approximately $362,000. Given that the proposed intersection improvements would be located within FDOT right-of-way, the City will work with FDOT to include these improvements in the future FDOT Alton Road Project from N. Michigan Avenue to 43 Street.