Scheduling 101 Calculating Running Time Metropolitan Atlanta Rapid Transit Authority Multimodal Operations Workshop Houston, TX

Transcription

1 Calculating Running Time Metropolitan Atlanta Rapid Transit Authority 2015 Multimodal Operations Workshop Houston, TX

2 MARTA FACTS MARTA is the ninth largest transit system in the U.S. that provides bus and paratransit service. The bus network, as of July 25, 2015, covered 1064 route miles with 97 bus routes supported by a fleet of 528 buses and 186 mobility vans. The rail network includes 4 Rail Lines, with over 23 million train car miles supported by a inventory of 200 rail cars and up to 33 trains operating daily. MARTA is the largest public transit system in the Southeast. MARTA s service population is over 2 million in the City of Atlanta, Fulton, DeKalb, & Clayton counties, carrying over ½ million passengers per day.

3 RUNNING TIME In this session I will cover the following : DEFINITION of Running Time vs Total Running Time Factors that AFFECT the calculation of Running Time TECHNOLOGY MARTA uses to monitor and improve Running Time STRATEGIES to better allocate running time

4 RUNNING TIME RUNNING TIME is the time it takes to make a one-way trip. A B The time it takes to get from point A to point B.

5 TOTAL RUNNING TIME TOTAL RUNNING TIME also referred to as Cycle Time, is the total time it takes to travel a route, round trip, including any time required for recovery at the end points. A B B A The time it takes to get from point A to point B, and back to point A.

6 FACTORS DISTANCE measured in miles (one-way) What is the length of a route? SPEED miles per hour How fast can the vehicle travel? Posted Speed Limits Traffic Conditions Ridership Patterns

7 DETERMINING DISTANCE How does MARTA determine the length of a route? Google Maps trace the route Field Observation travel the route Scheduling Software route trace

8 CONVERTING SPEED Speed must be converted from miles per hour to miles per minute. A. (60 Minutes/Miles Per Hour) = Minutes Per Mile SPEED (MPH) HOW LONG TO GO IN ONE (1) MILE minutes 20 3 minutes 15 4 minutes B. (Minutes Per Mile) * Total Distance = Running Time

9 CALCULATING TOTAL RUNNING TIME In order to calculate the Total Running Time, we simply combine the Running Time in each direction, and include any additional time. This additional time is sometimes referred to as recovery time, dwell time, layover, or break time.

10 TECHNOLOGY TECHNOLOGY - MARTA uses to monitor and improve Running Time. AVL - Automated Vehicle Location (Actual or real time Running Time values) APC - Automated Passenger Counters (Ridership or ons/off of passengers) TSP - Transit Signal Priority (Reduce dwell time at traffic signals for transit vehicles)

11 TRAVEL TIME REPORT At MARTA, we use an additional tool called the Travel Times Report (Crystal Report) & RideCheck Plus software. Each trip s running time is indicated respectively. Indicates the difference between actual trip time and scheduled trip time. Assists in monitoring On-Time Performance.

12 TRAVEL TIMES REPORT Indicates the difference between actual trip time and scheduled trip time. Each trip s running time is indicated respectively. Assists in monitoring On-Time Performance.

13 SCHEDULING STRATEGIES BONUS Scheduling 102

14 SCHEDULING STRATEGIES Scheduling 102 Here are a few methods used to optimize resources and save money after building trips with establishing efficient running times. INTERLINING REVERSE LOADED FREQUENCIES THE FORMULA

15 INTERLINING Scheduling 102 INTERLINING - is the combining of two routes at a shared connecting point. It takes advantage of shifting running time or recovery time from one route to another to balance runtime and reduces vehicle resource needs.

16 REVERSE LOADED FREQUENCIES Scheduling 102 PEAK DEMAND FREQUENCIES (Double-backing) - Provides increased service in the peak direction of travel by maintaining or reducing frequency in the non-peak direction of travel, however it does increase deadhead miles and hours. 15-min headway 25-min headway

17 THE FORMULA Scheduling 102 RT = f * v Total Running Time = frequency * # of vehicles RT = 30 * 2 RT = 60 f = RT / v frequency = Total Running Time divided by # of vehicles f = 60 / 2 f = 30 v = RT / f vehicles = Total Running Time divided by frequency of service v= 60 / 30 v= 2

18 SUMMARY Running Time Amount of Time Needed to Travel from Point A to Point B. Factors Determine Distance and Speed Technology Monitors and Improves Running Time Scheduling Strategies Optimize Resource Utilization

19 Q & A Question or Comments? THANK YOU FOR YOUR TIME Contact Information: Johnathan Terrell jterrell@itsmarta.com References provided by TCRP Report 30