1. ADECGIS-T 2011, St. Petersburg, Fl1 Transit Stop Consolidation Evaluation of State of Practice GIS in Transit 2011 St. Petersburg, Florida Sep. 13-15, 2011 Maaza Mekuria, PhD, PE, PTOE ADECorp San Jose, CA

2. ADECGIS-T 2011, St. Petersburg, Fl2 Modeling Paradigms Continuous –Pros Useful for exploring relationships between variables (demand, spacing, volume) –Cons Lacks sensitivity to –Location/safety –demand concentration –Access network geometry

3. ADECGIS-T 2011, St. Petersburg, Fl3 Modeling Paradigms Discrete –Pros (can be made to be sensitive to) Physical location Demand intensity Access network geometry –Cons Requires –More detailed data –Robust analytical tools –More time

4. ADECGIS-T 2011, St. Petersburg, Fl4 Stop Spacing Impacts

5. ADECGIS-T 2011, St. Petersburg, Fl5 Modeling Stop Spacing Single/Bi-Directional Stops Multiple Periods Sensitivity to Various Input Parameters Common Base for comparison What if scenarios

6. ADECGIS-T 2011, St. Petersburg, Fl6 State of the Practice Rule of Thumb based on –Demand at a stop –Proximity to the nearest stop –Other policy considerations

7. ADECGIS-T 2011, St. Petersburg, Fl7 Stop Spacing Optimization Geographic modeling –Walk impact using real street network –Demand density using parcel attributes –Stop enumeration –Multi-period analysis –Sensitivity analysis

8. ADECGIS-T 2011, St. Petersburg, Fl8 Service Area Analysis using three data sets

9. ADECGIS-T 2011, St. Petersburg, Fl9 DP Immediate Cost Computation To find costs at j, need to specify at least 1 or more predecessor successor stops >=1-dimensional search space

10. ADECGIS-T 2011, St. Petersburg, Fl10 Quintuplet DP Algorithm walk(k; i,j,l,m) - sum of walking cost impacts associated with stop k over all periods ride(k; i,j,l,m) - sum of riding cost impacts associated with stop k over all periods Oper(k; i,j,l,m) - sum of operating cost impacts associated with stop k over all periods f(l; j,k,m) – optimal return function cost impacts associated with stop l to the end.

11. ADECGIS-T 2011, St. Petersburg, Fl11 Study Area I Transit Details Route 57 Crosstown Bus –Kenmore to Watertown 45 Inbound and 43 Outbound existing stops Peak ridership –AM East Bound to Kenmore –PM peak Westbound to Watertown

12. ADECGIS-T 2011, St. Petersburg, Fl12 Study Area II Transit Details Route 1 Crosstown Bus 35 SB, 36 NB existing stops Peak ridership –Balanced in both directions

13. ADECGIS-T 2011, St. Petersburg, Fl13 Rt 57 Cross-town Bus DP Result Comparison Vs Consultant Recommendation (Inbound dirn.) number of stops (Inbound) Change in Walk Time (Pax- Min/Day) Change in Running Time (min) Change in Walk Cost ($/Day) Change in Ride Cost ($/Day) Change in Operatin g Cost ($/Day) Change in Total Cost ($/Day) Existing45 Analyst recommendation317669-1.9$3,672-$2,509-$488$674 DP Optimum323955-1.8$1,761-$2,211-$469-$920

14. ADECGIS-T 2011, St. Petersburg, Fl14 Rt 1 Cross-town Bus DP Result Comparison Vs Consultant Recommendation Total 2-way stops Average walk time (min) Average ride time (min) Avg two- way running time (min) Change in Walk Cost ($/day) Change in Ride Cost ($/Day) Change in Oper Cost ($/Day) Change in Total Cost ($/Day) Existing713.4636.488.5 0000 Analyst recommendation553.7735.787.4705-267-113326 DP Optimal453.5735.586.1243-218-156-132

15. ADECGIS-T 2011, St. Petersburg, Fl15 Summary State of the Practice can not capture all factors Use of standard data sets Appropriate tools with flexibility Analyst input Geographic Output

16. ADECGIS-T 2011, St. Petersburg, Fl16 Questions?