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Stratified Transit Market Segmentation . Multiple ways to Walk to Transit…. Multiple Transit Modes to Walk to. TRB Transportation Planning Applications Conference . Dan Tempesta. May 8, 2013. Marty Milkovits. Presentation Overview. Typical Market Segmentation
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Stratified Transit Market Segmentation Multiple ways to Walk to Transit…. Multiple Transit Modes to Walk to TRB Transportation Planning Applications Conference Dan Tempesta May 8, 2013 Marty Milkovits
Presentation Overview • Typical Market Segmentation • Shortcomings of Typical Market Segmentation • Stratified Market Segmentation
Typical Market Segmentation • Available Mode Choice Options • DA: Drive Alone, • SR: Shared Ride, • WB: Walk to Bus, • WP: Walk to Premium, • DB: Drive to Bus, • DP: Drive to Premium, and • NM: Non-motorized Modes (Walk and Bike) • Options Defined by Access Mode and Transit Mode
Typical Market Segmentation • Mode Accessibility • DA: Drive Alone – Accessible to All TAZ • SR: Shared Ride – Accessible to All TAZ • WB: Walk to Bus – Accessible to TAZ with Transit • WP: Walk to Premium – Accessible to TAZ with Transit • DB: Drive to Bus – Accessible to All TAZ • DP: Drive to Premium – Accessible to All TAZ
Typical Market Segmentation • Availability/Accessibility • Accessibility – Zone Based • Availability – Zone Pair Based
Shortcomings • Consider a TAZ with 2 transit stops TAZ • 46% of the TAZ is walk accessible • 54% of the TAZ is drive to transit accessible
Shortcomings • Now add a new rail station TAZ • 66% of the TAZ is walk accessible • 34% of the TAZ is drive to transit accessible
Why is this a Shortcoming? • The model will give 66% of the TAZ walk to transit accessibility • This overstates the accessibility of BOTH bus and rail TAZ
Stratified Transit Market • Need Mode Specific Transit Buffers • Stratified Markets • Bus Accessible (Blue) • Rail Accessible (Red) • Bus & Rail Accessible (overlap), and • Auto Only Accessible (No Coverage) TAZ
Implementation • The Devil is in the Details
Stratified Transit Market • The Paths Matter • “Bus” Trips are transit trips that do not use Rail at all during their trip • “Rail” Trips use rail at some point during their trip
Stratified Transit Market • Walk to Rail Restrictions Bus/Rail indicates that no restriction is necessary and N/A indicates that there would not be a path available for this option by definition
Stratified Transit Market • Drive to Rail Restrictions Bus/Rail indicates that no restriction is necessary and N/A indicates that there would not be a path available for this option by definition
Stratified Transit Market Production Attraction
Stratified Transit Market Production Attraction
Stratified Transit Market • Combine Market Specific Paths with Market Shares
Conclusions • Stratifying the Transit Market will remove artificially high walk Accessibilities • Implementation Requires • Mode Specific Buffers • Path Restrictions