Roundabouts & Traffic Engineering (RTE) submitted a proposal to Kings Beach Business & Citizens Alliance to conduct a capacity review of a proposed roundabout along the Kings Beach Corridor. The proposal outlined 7 tasks for the review, including reviewing existing conditions, future traffic volumes, conducting capacity analyses, reviewing roundabout placement and design, and providing a recommendations memorandum. The cost for the work was estimated at $6,000 to be billed on a percent complete basis, with any additional work billed at $180 per hour. RTE requested various design documents and traffic data to complete the tasks and encouraged further involvement if additional roundabout design assistance was needed.

1. Roundabouts & Traffic Engineering
20 Crimson Vista Lane Sedona, Arizona 86351 www.roundabouts.us
October 27, 2009
Jerry Joseph Dinzes
Kings Beach Business & Citizens Alliance
PO Box 349
Tahoe Vista, California 96143
P: (530) 546-8297
RE: Kings Beach Roundabout Capacity Review
Dear Mr. Dinzes:
Thank you for requesting roundabout services from Roundabouts & Traffic Engineering
(RTE). Per your request, RTE has prepared this brief proposal for a various number of
tasks for professional roundabout review services for one roundabout along the Kings
Beach Corridor for the Kings Beach Business & Citizens Alliance. Due to a limited
budget, RTE’s scope of work will consist of a cursory peer review of one of the
roundabouts in the project corridor primarily consisting of the capacity analyses and
lane configuration requirements of the roundabout based on future pre-approved
design year volumes. As time permits, additional safety review tasks will be performed
based on general observations of the proposed roundabout design since more detailed
safety analyses cannot be completed without an electronic design file or additional time
and budget.
Consistent with other roundabout review services we have conducted in the past, RTE
has outlined the following roundabout review tasks to be completed. Essentially, RTE
will review and perform analyses based on the traffic volume information provided
with respect to capacity. The product for this phase of work will be a brief technical
memorandum identifying the resulting capacity requirements and lane configuration
requirements of the roundabout. As stated above and if time permits, general safety
evaluations will be noted therein from the preliminary roundabout design concepts
provided. The following tasks highlight some of the tasks associated with this cursory
review and also identify the review material requested from your group.
If this project proceeds further or if at any point during this project further design or
peer review assistance is needed, RTE encourages your group and the jurisdictions
involved to allow RTE to either produce the roundabout designs and non-geometric
Roundabouts & Traffic Engineering
ARIZONA OFFICE
20 Crimson Vista Lane
Sedona, Arizona 86351
Direct: (928) 284-0295
Main: (928) 284-0366
www.roundabouts.us

2. Kings Beach Capacity Analyses Page 2 October 27, 2009
Roundabout Review Services
Roundabouts & Traffic Engineering
20 Crimson Vista Lane Sedona, Arizona 83651 www.roundabouts.us
design details with the project team or perform detailed peer reviews of the
roundabouts to ensure these roundabouts will operate safely with adequate capacity
and be implemented properly in the field.
Task 1: Review of Existing Conditions: A review will be performed of the project
area, most recent site plans, and roadway alignment information as provided to RTE
from your group. If available, we request the most recent electronic files (in AutoCAD
2000 format) for the existing and proposed roadways (including the roundabout
layouts) with respect to surrounding topography, centerlines, curb faces, edge of
pavement, roadway lane markings (striping), existing or proposed bike lanes and
sidewalks, environmental constraints, buildings, and right of way constraints labeled on
the base map file for RTE’s review and use. Since it is assumed herein this information
is not available, detailed plans, images, and/or PDF documents of the proposed
roundabouts (to scale or with dimensions) should be provided. This should include
any special design constraints such as specific properties, drainage facilities, parking,
and snow storage areas which cannot be encroached. Your group should verify if any
of the above information is available and provide any specific roundabout related
material to RTE prior to commencing work.
Task 2: Review Future Conditions: RTE will need to review the data currently
available and specifically the future AM and PM peak hour turning movement volumes
at the selected roundabout intersection (developed from approved future projected
traffic volume data). Since your group is most familiar with current updates and traffic
volumes, RTE requests the final and relevant volume data numbers prior to
commencement of our analyses. Simple schematic diagrams consisting of the final
future peak hour turning movement volumes at the intersection are requested. In order
to accurately identify the roundabout geometric and capacity needs, the following is
requested prior to starting the capacity (RODEL) analyses for the selected roundabout:
Future AM Peak Hour Turning Movement Volumes
Future PM Peak Hour Turning Movement Volumes
Future Percent Heavy Vehicles (by Approach) for Each Peak Hour
Design Vehicle Type by Turning Movement (e.g. WB-62, WB-67, CTDV, etc.)
ROW Constraints
Existing and Proposed Roadway Alignment Base Map (with travel lanes,
proposed face of curb, existing and proposed striping, bike lanes, ROW, etc.)
The future traffic conditions with respect to the operations and flows of the existing and
proposed roadways will be reviewed and possibly discussed with your group for
project understanding and operational issues. These operational issues including the

3. Kings Beach Capacity Analyses Page 3 October 27, 2009
Roundabout Review Services
Roundabouts & Traffic Engineering
20 Crimson Vista Lane Sedona, Arizona 83651 www.roundabouts.us
potential delays will be utilized in the review process and geometry criteria for capacity
purposes.
This task will also include verification of the appropriate heavy design vehicle and
heavy vehicle volume percentages per approach assumed for the roundabouts.
Although at this point the design vehicle is assumed to be a Caltrans Design Vehicle,
the heavy design vehicles should be identified for each turning movement for the
required design constraints of the roundabout (if electronic design files can be
obtained). Therefore, RTE will verify all sets of volumes, including truck volumes, and
discuss with your group any concerns that we may encounter.
In addition, some form of explanation of the current conceptual layouts as it has
developed is anticipated to be within the preliminary information or other provided
documents. This accounts for the specific project details and roundabout alternatives as
well as specific avoidance of site constraints. This is requested for RTE’s understanding
of the roundabout alternatives, the jurisdiction’s desires, and the project constraints.
Task 3: Capacity Analyses: After obtaining all of the pertinent information regarding
the roadways, site, and traffic volumes, a geometric analysis of the proposed
roundabouts using the roundabout design software tool called RODEL (Roundabout
Delay) will be conducted for the selected roundabout intersection. The RODEL
calculations will provide the entry lane geometry and capacity requirements for the
roundabout based on the future design volumes. This will set the design requirements
for the initial roundabout concepts. The AM and PM traffic volumes will need to be
analyzed under several software variables and confidence levels. This will ensure the
roundabouts will operate appropriately under all peak hour traffic conditions during
typical design and critical design operations. Although only a summary report will be
submitted, the final results of this analysis will produce the following initial
information:
Roundabout diameter (estimated size)
Entry lane configurations at each approach
Future traffic volume capacity by approach
Minimum approach widths with respect to software capacity
Estimated entry radii of the roundabout
Delay of each approach and the overall delay of the intersection in seconds
Queue lengths for each approach
Future Level of Service

4. Kings Beach Capacity Analyses Page 4 October 27, 2009
Roundabout Review Services
Roundabouts & Traffic Engineering
20 Crimson Vista Lane Sedona, Arizona 83651 www.roundabouts.us
Task 4: Alignment, Lane Configuration, & Roundabout Placements: Once the
minimum design requirements have been established, the roundabout layout provided
can be reviewed by initially identifying the flow of traffic and lane configuration
requirements for the circulatory roadway and the exits of the roundabout. This task
includes a general review of the placement of the roundabout’s circle. RTE will provide
general guidance to roughly determine the recommended roadway alignments, lane
configurations, roundabout placement, and general location of the proposed
roundabout. Special consideration will be taken for any ROW constraints and desired
roadway placements/alignments.
Task 5: Cursory Horizontal Design Reviews: Once the minimum design requirements
have been verified and if time permits, further roundabout design review tasks will be
conducted by applying and comparing the results above to the conceptual layouts
produced (designs produced by others) with respect to the flow of traffic and lane
configuration requirements for the circulatory roadway and the exits of the roundabout.
The design and review of roundabouts requires vast design knowledge and working
comprehension of operational roundabouts. RTE will review the horizontal
roundabout design with respect to general operational safety parameters (not detailed
horizontal geometric design parameters). In addition to the preceding and subsequent
tasks herein, the review items may include:
1. Verify an estimated yet adequate roundabout diameter
2. Verify adequate number of entry, circulating, and exit lanes required for future
capacity and safety operations
3. Verify general capacity of submitted conceptual roundabout layout
4. Verify placement location of each roundabout’s diameter
5. Verify general horizontal layout of roundabout (safety)
6. Provide simple horizontal review comments (capacity and safety)
It should be clearly noted, as we discussed, this cursory review of the proposed
roundabout does not include specific or detailed design review of the roundabouts
such as fastest path review to verify adequate and reasonable speeds and deflection in
the design, design vehicle review for truck turning movements, truck apron sizes,
proper accommodations for safe and compliant pedestrian facilities and refuges,
specific splitter island design, vertical design aspects, signing, lighting, landscaping,
construction materials, drainage, or sight distances as these issues are usually
completed in final design. Some comments may discuss these items in general, but are
not specific in nature and not intended to be precise design parameters used in final
design or a completed design review (peer review). It is encouraged and required by

5. Kings Beach Capacity Analyses Page 5 October 27, 2009
Roundabout Review Services
Roundabouts & Traffic Engineering
20 Crimson Vista Lane Sedona, Arizona 83651 www.roundabouts.us
some jurisdictions to use a qualified roundabout design specialist in creating final
roundabout geometry to ensure adequate capacity and operational safety.
Task 6: Recommendations Memorandum: Once the capacity and safety results have
been determined and any other issues identified, RTE will provide a brief
memorandum of the results and general recommendations for the roundabout. The
design comments and parameters will be documented for further discussion via
teleconference.
Task 7: Coordination/Discussions: This entails coordination with your group in
conference call arrangements to discuss the scope and recommendations in detail. As
we discussed, no in-person meetings or presentations are included herein.
OTHER COMMENTS
Any changes to the provided design volumes, provided information, scope tasks, ROW
requirements, or the like may require additional time and fees. Changes to a horizontal
roundabout design produced by Scott Ritchie / RTE without authorization of RTE is
strictly prohibited unless authorized in writing by Scott Ritchie. This requirement is set
herein for public safety measures and operational capacity requirements. Furthermore,
a review performed by Scott Ritchie / RTE of a roundabout design produced by others
where deficiencies are identified and not corrected by the licensed engineer in charge
does not constitute a proper roundabout design wherein significant capacity and safety
issues may still be present. RTE assumes no liability of such improperly corrected or
design problems. RTE will not endorse any roundabout design that has been modified
to create unsafe speeds, operational or safety issues.
RTE encourages the presentation of its work for the project to the local jurisdiction. In
addition, RTE also encourages RTE’s involvement in developing proper public
education through a public educational campaign. If any additional in-person
presentations are requested for the final presentation of the roundabout or results at
public meetings, this can be accommodated. Time will be required to develop
presentation material, travel time, and attendance to any meetings. Any additional time
or travel requests not noted herein will be billed under a separate agreement.
COSTS & RATES
All RTE analysis and review work will be performed exclusively by RTE’s Roundabout
Specialist and President Scott Ritchie. The estimated cost for this analysis and the
associated tasks herein requires exceedingly more cost than the current budget allows

6. Kings Beach Capacity Analyses Page 6 October 27, 2009
Roundabout Review Services
Roundabouts & Traffic Engineering
20 Crimson Vista Lane Sedona, Arizona 83651 www.roundabouts.us
for this work; however, RTE has agreed to perform the work stated herein for your
specified budget or cost of $6,000. The tasks will be performed and billed on a percent
complete basis. Any additional work will require a written amendment and can be
determined based on Scott Ritchie’s standard billing rate of $180.00 per hour plus
reimbursables for all roundabout services.
RTE will make every effort to comply with the scheduling needs of the project. Signing
this proposal and/or executing your standard consultant agreement will allow RTE to
set up a billing file and commence services. Thank you for the opportunity to work
with you and the Kings Beach Business & Citizens Alliance
Respectfully Submitted,
Roundabouts & Traffic Engineering,
Billing Information: Approved for CLIENT:
Project I.D./Ref.# By
Send Invoice to: Print Name
Title
Date______________________________