Intersection Control Evaluation Report Project: Alternative: Location: Evaluator:

Transcription

1 Report Project: Alternative: Location: Evaluator: Franklin/Interstate-15 Interchange City of Lake Elsinore, 33 40'13.08"N '34.30"W Jeffrey Hsu

2 1 Introduction Policy Directive calls for the implementation of (ICE) to projects concerning the following: Encroachment permit proposals to construct new or expand existing intersections. Project identification and initiation efforts proposing: o New highway facilities. o New intersections and interchanges on existing highways. o Existing intersection and interchange capacity expansion. o New or expanded access to mitigate traffic impacts generated by development. Traffic signal, multi-way stop control, and yield controlled roundabout proposals. Expansion or modification proposals for existing signalized intersections, roundabouts, and traffic circles. ICE is a two-step project that allows engineers to justify the installation of traffic signal systems, yield control (roundabouts), and multi-way stop control at state highway intersections and interchanges. It also helps identify effective intersection traffic control strategies and alternative treatments, approaches, and configurations for particular conditions as well as estimate the relative effectiveness and impacts of specific control strategies. Project The proposed project calls for a new interchange at the City of Lake Elsinore between the Main Street and Railroad Canyon. This interchange requires a new bridge and the existing roadway to be realigned. Due to these plans, new intersections will be created. Four alternatives were generated, but the focus for this report is the alternative. For the Tight Diamond, six new intersections will be created. The overview map is shown in Figure 1.

3 2 Figure 1: Overview Map Current Control: None Need for Control: Franklin Intersection Project requires the design of 6 new intersection designs. The intersection names are based on Figure Franklin St/Elsinore Hills 2. SB Ramp/Elsinore Hills 3. NB Ramp/Elsinore Hills 4. Canyon Estates/Elsinore Hills 5. Franklin St/Ave 6 6. Canyon Estates/Franklin St.

4 3 Step 1: Assessment of Control Alternatives The objective of the first step in ICE is to identify access solution concepts that merit further consideration. To do this, we must understand the need, identify what strategies/configurations will meet the need, and assess to eliminate non-viable and impractical strategies. For this project, stop, yield (roundabout), and signal control were chosen as base control types to consider for each intersection. The feasibility of these control types were evaluated for each intersection to determine if the control type should proceed to the next step or be eliminated. Since these are all new intersections, other control types were not considered as implementing anything too exotic may be unnecessary and/or confuse drivers. Table 1 summarizes control alternatives that will proceed to step two for each intersection. Yes denotes that the control type will proceed to step 2 of ICE. No indicates that the control type will be eliminated from further analysis. Yield control for intersections Franklin St/Ave 6 and Canyon Estates/Franklin St were eliminated because the grading is approximately 7% and 4%, respectively. The grades are too steep and will cause difficulties for vehicles to slow down or stop. This also potentially creates a dangerous environment for pedestrians and bicyclists. Table 1: Control Alternative Summary Intersection Stop Yield Control Signalized Other Control (Roundabout) Control Control E Franklin St/Elsinore Hills Yes Yes Yes No SB Ramp/Elsinore Hills Yes Yes Yes No NB Ramp/Elsinore Hills Yes Yes Yes No Canyon Estate/Elsinore Hills Yes Yes Yes No E Franklin St/Ave 6 Yes No Yes No Canyon Estate/Franklin St Yes No Yes No

5 4 Step 2: Engineering Analysis of Control Alternatives The objective of step two is to analyze and compare each control alternative to each other and determine the best option for the specific intersection. It is important that intersection cost and performance are considered in the analysis. Prior to comparing the control types, a warrant study was done using Warrant 3 of the MUTCD. The study concluded that all intersections satisfied the warrant. With that and some engineering judgment, it was decided to eliminate stop controls from further consideration for each intersection. Data provided by Caltrans, Synchro 8, and SimTraffic 8 were used for this analysis. Parameters considered for each control type include total intersection delay, fuel use, and total stops. The total network was also analyzed to determine if the control affected the total network positively or negatively. A weighted decision matrix was also created for each intersection to better quantify the reasoning for the final decision. Decision factors considered in the matrix are fuel used, adaptability, costs, intersection delay, right-of-way impact, total stops, total network impact, pedestrian/bicycle accessibility, and driver s expectation. The weighted decision matrix for each intersection can be found in the Appendix. Tables 2 through 6 compare parameters for each control type and summarize the totals calculated from the weighted decision matrix for each intersection. Note that although a specific control type may have yielded better results for the intersection analysis, other factors shown in the weighted decision matrices (costs, adaptability, etc.) may have resulted in the selection of a different control.

6 5 1) Franklin St/Elsinore Hills Table 2a. Intersection Analysis Total Delay (hr) Fuel Used (gal) Total Stops Total Network Analysis Total Delay (hr) Fuel Used (gal) Total Stops Table 2b. Evaluation Score Control Type Total Score Stop - Signal 317 Yield (Roundabout) 264 2) SB Ramp/Elsinore Hills Table 3a. Intersection Analysis Total Delay (hr) Fuel Used (gal) Total Stops Total Network Analysis Total Delay (hr) Fuel Used (gal) Total Stops Table 3b. Evaluation Score Control Type Total Score Stop - Signal 333 Yield (Roundabout) 280

7 6 3) NB Ramp/Elsinore Hills Table 4a. Intersection Analysis. Total Delay (hr) Fuel Used (gal) Total Stops Total Network Analysis Total Delay (hr) Fuel Used (gal) Total Stops Table 4b. Evaluation Score. Control Type Total Score Stop - Signal 319 Yield (Roundabout) 301 4) Canyon Estates/Elsinore Hills Table 5a. Intersection Analysis. Total Delay (hr) Fuel Used (gal) Total Stops Total Network Analysis Total Delay (hr) Fuel Used (gal) Total Stops Table 5b. Evaluation Score. Control Type Total Score Stop - Signal 292 Yield (Roundabout) 324

8 7 5) E Franklin St/Ave 6 Table 6a. Intersection Analysis. Control Type Stop* Signal Yield (Roundabout) Total Delay (hr) Fuel Used (gal) Total Stops Total Network Analysis Total Delay (hr) Fuel Used (gal) Total Stops *Note that E Franklin St is free while Ave 6 is Stop controlled. Table 6b. Evaluation Score. Control Type Total Score Stop - Signal 341 Yield (Roundabout) - 6) Canyon Estate/Franklin St Table 7a. Intersection Analysis Total Delay (hr) Fuel Used (gal) Total Stops Total Network Analysis Total Delay (hr) Fuel Used (gal) Total Stops Table 7b. Evaluation Score. Control Type Total Score Stop - Signal 363 Yield (Roundabout) -

9 8 Evaluation Summary Based on the performed engineering analyses, the following table summarizes the selected control type for each intersection. Table 8. Control Selection Summary. Number Intersection Control Type 1 E Franklin St./Elsinore Hills Signal 2 SB Ramp/Elsinore Hills Signal 3 NB Ramp/Elsinore Hills Signal 4 Canyon Estates/Elsinore Hills Yield (Roundabout) 5 E Franklin St./Ave 6 Signal 6 E Franklin St./Canyon Estates Signal

10 9 Appendix

11 10 Weighted Decision Matrix: Franklin St/Elsinore Hills Factors Weight Score Total Factors Weight Score Total Fuel Use Total Stops Signal Control 8 24 Signal Control Yield (Roundabout) 6 18 Yield (Roundabout) 9 54 Other Other Adaptability Total Network Impact Signal Control 8 16 Signal Control Yield (Roundabout) 4 8 Yield (Roundabout) 7 63 Other Other Cost Pedestrian/Bike Friendly Signal Control 7 49 Signal Control Yield (Roundabout) 3 21 Yield (Roundabout) 5 20 Other Other Intersection Delay User Expectation Signal Control 6 48 Signal Control Yield (Roundabout) 7 56 Yield (Roundabout) 4 20 Other Other R/W Impact Total - Signal Control 8 8 Signal Control Yield (Roundabout) 4 4 Yield (Roundabout) 264 Other Other -

12 11 Weighted Decision Matrix: SB Ramp/Elsinore Hills Factors Weight Score Total Factors Weight Score Total Fuel Use Total Stops Signal Control 6 18 Signal Control Yield (Roundabout) 8 24 Yield (Roundabout) 8 48 Other Other Adaptability Total Network Impact Signal Control 8 16 Signal Control Yield (Roundabout) 4 8 Yield (Roundabout) 7 63 Other Other Cost Pedestrian/Bike Friendly Signal Control 7 49 Signal Control Yield (Roundabout) 3 21 Yield (Roundabout) 5 20 Other Other Intersection Delay User Expectation Signal Control 8 64 Signal Control Yield (Roundabout) 9 72 Yield (Roundabout) 4 20 Other Other R/W Impact TOTAL SCORE - Signal Control 8 8 Signal Control Yield (Roundabout) 4 4 Yield (Roundabout) 280 Other Other -

13 12 Weighted Decision Matrix: NB/Elsinore Hills Factors Weight Score Total Factors Weight Score Total Fuel Use Total Stops Signal Control 6 18 Signal Control Yield (Roundabout) 8 24 Yield (Roundabout) Other Other Adaptability Total Network Impact Signal Control 8 16 Signal Control Yield (Roundabout) 4 8 Yield (Roundabout) 8 72 Other Other Cost Pedestrian/Bike Friendly Signal Control 7 49 Signal Control Yield (Roundabout) 3 21 Yield (Roundabout) 5 20 Other Other Intersection Delay User Expectation Signal Control 7 56 Signal Control Yield (Roundabout) 9 72 Yield (Roundabout) 4 20 Other Other R/W Impact TOTAL SCORE - Signal Control 8 8 Signal Control Yield (Roundabout) 4 4 Yield (Roundabout) 301 Other Other -

14 13 Weighted Decision Matrix: Canyon Estates/Elsinore Hills Factors Weight Score Total Factors Weight Score Total Fuel Use Total Stops Signal Control 9 27 Signal Control Yield (Roundabout) 7 21 Yield (Roundabout) Other Other Adaptability Total Network Impact Signal Control 8 16 Signal Control Yield (Roundabout) 4 8 Yield (Roundabout) Other Other Cost Pedestrian/Bike Friendly Signal Control 7 49 Signal Control Yield (Roundabout) 3 21 Yield (Roundabout) 5 20 Other Other Intersection Delay User Expectation Signal Control 4 32 Signal Control Yield (Roundabout) Yield (Roundabout) 4 20 Other Other R/W Impact TOTAL SCORE - Signal Control 8 8 Signal Control Yield (Roundabout) 4 4 Yield (Roundabout) 324 Other Other -