Diego Moreno-Sosa Portfolio

Transit O-D Matrix estimation based on observed transit counts in Cartagena, Colombia, using different assignment methods.

ABSTRACT

This document presented a comparison between different assignment methods toestimate a new transit O-D matrix in Cartagena , Colombia.

According to the results of the process, the incremental method assigns lessvolume than the one anticipated (slope below 1), however it maintains values thatcan be acceptable. Moreover, stochastic methods both involving Logit as Kirchhoffoverestimate demand, as volumes obtained form a trend line with a slope greaterthan 1, the dynamic user equilibrium was the method that threw the worst resultshaving underestimated volumes which has a GEH close to 10 .

The method that best fits the data obtained in the field is the user equilibriumwith a slope of 0.91 and an R2 of 0.89,whereas the average GEH statistic is 7.8 ,however, 85% of the assigned volumes are placed in a GEH range below 5.0, whichsuccessfully validates this method as the one which best fits the city’s conditionsduring peak hour.

METHOD

Regression analysis

GEH Statistic

Average GEH

Statistic, 85th

percentileSlope R2

Incremental 0.88 0.88 7.9 5.5

User Equilibrium 0.9 0.89 7.8 5.4

Stochastic assignment -

Logit1.08 0.83 10.3 8.2

Stochastic assignment -

Kirchhoff1.07 0.83 10.2 8.1

Dynamic user

equilibrium0.75 0.79 9.8 6.5

Professional Portfolio

Diego Alejandro Moreno-Sosa

Travel demand assessment for a Light Rail system in Bogotá, Colombia.

ABSTRACT

The travel demand assessment described the information, criteria and processes, inforecasting the potential demand in different scenarios of the city’s public transport network,integrated to a light rail system, as an integral part of the BRT subsystem, in which the urbanand regional public transport infrastructure can be effectively integrated.

The definition of the functional units to be developed in the project, had been based on thecriteria or goals set as triggers for progress in the expansion of the line, consequently thestrategy must be established as progressive, depending on the behavior of travel demand anddevelopment of different urban and regional system components in the city . There are stillmany uncertainties about the real future of the city’s mobility system, which is why thechosen development strategy is the most suitable one.

DESCRIPTION Scheme YearHighest transit flow

segmentDirection of flow

Max transitflow

Travel demand (total boarding)

Pas/hour Peak hour day year

Est Sabana - Calle100 and vice

versa2019

Cra 7 x Calle 48 - Calle 42 N-S 5,236 - - -

Cra 7 x Calle 42 - Calle 48 S-N 8,929

TOTAL BOTH -20,849 194,104

57,558,503

Est Sabana - Calle193 and vice

versa2019

Cra 7 x Calle 48 - Calle 42 N-S 7,499 - - -

Cra 7 x Calle 42 - Calle 48 S-N 10,397

TOTAL BOTH -28,152 262,095

77,720,129



Pedestrian’s infrastructure assessment of the Bullring “Santamaría” in Bogotá, Colombia.

ABSTRACT

The assessment contained the validation occupancy rates proposed by the localgovernment to the bullring. It contains an estimate of operational indicators, to identifythe technical-and safety flaws of the current design to develop a new proposal.

The plan to access or exit the premises, had to be a solution that do not involve theexpansion of the current entrance/exit due to architectonical restrictions from the localgovernment.

Noting the values returned by the government proposal, it appears that the net floorarea per viewer is far below the minimum regulated of 0.7 m2/Pedestrian, therefore thenew proposed capacity is 3940 spectators, based on the maximum net area available forthe event (2764.60 m2) and the maximum evacuation time of 75 pedestrians perminute.

Current situation

LocationPerimeter

radioTotal area

(m2)Utilization

levelNet area

(m2)Occupancy

levelMaximum occupancy

m2 x pedestrian

Balcony 40 1,178 50% 589 20% 3,000 0.20

VIP 35 2,592 50% 1,296 40% 6,000 0.22

Platinum 20 1,257 70% 880 40% 6,000 0.15

Proposed situation

LocationPerimeter

radioTotal area

(m2)Utilization

levelNet area

(m2)Occupancy

levelMaximum occupancy

m2 x pedestrian

Balcony 40 1,178 50% 589 21% 827 0.71

VIP 35 2,592 50% 1,296 47% 1,852 0.70

Platinum 20 1,257 70% 880 32% 1,261 0.70



Microscopic simulation of road closures in the NQS avenue in Bogotá as part of a traffic management plan.

ABSTRACT

In order to mitigate the impact generated during the construction phase of a specific project, there was a necessity to design a Traffic Management Plan,sings and Detours, which will allow the correct execution of the work’s schedule under safe conditions, without significantly affecting the mobility of thesurrounding users. Given the degree of complexity of the construction to develop the project, several stages were proposed to decrease the impact of theusers.

The processing information and analysis of the current situation are use to build the baseline scenario, on which a set of operational indicators are measuredto asses the conditions of the situation currently implemented. The proposed alternatives are tested on a network with the required detail to be used on amicroscopic traffic simulation modelling software.

Junction PMT Stage 2, phase II, Option A PMT Stage 2, phase II, Option B

Location ApproachDELAY

(SEC/VEH)Max queue

(m)LOS DELAY (SEC/VEH)

Max queue (m)

LOS

AV NQS X CALLE 2

NORTH 26.7 153.4 C 11.5 60.4 B

SOUTH 132.6 206 F 110.1 206.5 F

WEST 141.5 139.5 F

South lane188.5

296.9 F

North lane 138.4

197.6 F

EAST 151.4 107.7 F - - -

Junction (Total) 86.9 F 86.2 F



A proposal to implement an Integrated Public Transportation System in Valledupar, Colombia.

ABSTRACT

The city of Valledupar had been expanding its urban area, reaching a population of423.000 inhabitants in 2012. On a daily-basis, 59.500 trips are take on publictransportation, this represents 16% of the total number of daily trips in all modes oftransportation.

The analysis was focused on a preliminary approach for the required components ofValledupar’s integrated public transportation system, which covers; route systemdesign, required infrastructure, financial appraisal, legal considerations and a riskassessment matrix.

The hexagonal network configuration and the demand’s location influences theconfiguration of a mixed system of routes; 1. A diametrical configuration that allowsthe system to pick up the surrounding demand in the boroughs of the periphery,allowing the system to move more demand to the city center, area with the biggestrate of attracted trips. 2. Radial routes that allow the system to integrate the activitycenter and the most dense areas in the outskirts of the city.

The strategic public transport system in Valledupar must be aimed at a reduction intravel times in public service vehicles within the city, as a direct result of thestrategies implemented in the restructuring of routes, which also leads to a decreasein operating costs of the system overall.

It is vital to establish a network of bike paths and pedestrian corridors that allow safepedestrian access to the areas intervened by this project and to the historic center;core of the tourism sector and one of the keys to attract investment to the city .



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Diego Moreno-Sosa Portfolio