Iván Darío Sánchez-Díaz

Iván Darío Sánchez-Díaz
Chalmers University of Technology · Department of Technology Management and Economics

PhD

About

71
Publications
20,761
Reads
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1,277
Citations
Citations since 2016
42 Research Items
1178 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Introduction
Iván Sánchez-Díaz currently works at the Department of Technology Management and Economics, Chalmers University of Technology. Iván does research in Freight Transportation Engineering.
Additional affiliations
September 2014 - July 2016
Chalmers University of Technology
Position
  • PostDoc Position
August 2009 - May 2014
Rensselaer Polytechnic Institute
Position
  • Researcher
Education
August 2012 - August 2014
Rensselaer Polytechnic Institute
Field of study
  • Applied Mathematics
August 2009 - May 2012
Rensselaer Polytechnic Institute
Field of study
  • Transportation Engineering
August 2009 - May 2014
Rensselaer Polytechnic Institute
Field of study
  • Transportation Engineering

Publications

Publications (71)
Article
Full-text available
Increasing urbanization, and the environmental and liveability impacts associated with urban activity, have directed attention to the need for sustainable cities. Achieving sustainable urban development requires including freight systems in strategic urban development plans. In this context, joint efforts involving academia and public- and private...
Article
Full-text available
This paper presents a comprehensive review of the literature on off-peak hour deliveries (OPHD). The review identifies different approaches and policy levers used in the past, such as the laissez-faire approach, a road pricing approach, an incentives approach, and a regulatory approach. The paper also identifies different delivery reception schemes...
Article
Full-text available
This paper discusses the importance of incorporating online home delivery services (OHDS) into the concept of accessibility and marginalization. The authors propose a method to quantify access to OHDS and assess levels of inequalities in access to OHDS using data from OHDS providers in the pharmaceutical and food sectors, as well as from transport...
Article
Routing electric commercial vehicles requires taking into account their limited driving range, which is affected by several uncertain factors such as traffic conditions. This paper presents the time-dependent Electric Vehicle Routing Problem with Chance-Constraints (EVRP-CC) and partial recharging. The routing method is divided into two stages, whe...
Article
Full-text available
This paper studies the impact of offices on urban freight traffic. Research on freight activity generated by offices is very limited because they are not seen as important contributors to urban freight traffic, and because the amount of deliveries per office is very small compared to the number of deliveries per establishment in freight-intensive s...
Article
This paper analyzes truck parking patterns in urban freight loading zones by jointly modeling the vehicle arrival rates and the parking durations. Three models were explored: 1) Count data (Negative Binomial) for vehicle arrivals, 2) Survival (Weibull) model for parking duration and 3) A joint model for arrivals and duration. The count data model e...
Article
Full-text available
Freight parking operations occur amid conflicting conditions of public space scarcity, competition with other users, and the inefficient management of loading zones (LZ) at cities’ curbside. The dynamic nature of freight operations, and the static LZ provision and regulation, accentuate these conflicting conditions at specific peak times. This gene...
Article
This paper studies demand for public loading zones in urban environments and seeks to develop a machine learning algorithm to predict their demand. Understanding and predicting demand for public loading zones can: (i) support better management of the loading zones and (ii) provide better pre-advice so that transport operators can plan their routes...
Article
Full-text available
Freight transport management and planning traditionally relies on freight transport models. However, e-commerce has changed the way freight is transported and requires a paradigm shift in such models. In contrast to conventional purchases in physical outlets, there is a spatial and temporal disconnection between the purchase and the reception of go...
Article
Dynamic routing of electric commercial vehicles can be a challenging problem since besides the uncertainty of energy consumption there are also random customer requests. This paper introduces the Dynamic Stochastic Electric Vehicle Routing Problem (DS-EVRP). A Safe Reinforcement Learning method is proposed for solving the problem. The objective is...
Article
Commercial activity and the underlying freight movements supporting them are essential to urban life. Unfortunately, urban freight has negative effects on sustainability and requires innovative approaches to enhance the positive aspects and minimize the negative ones. There is a common understanding among practitioners, with support from the litera...
Article
The purpose of this study is to investigate which dry port services generate the greatest positive impact on stakeholders and their objectives. Stakeholders identified from the literature are the dry ports, the dry port’s municipality/region, the seaport, shippers, shipping lines, rail operators, and road operators. A method based on multi-actor mu...
Article
Full-text available
Cross-country evidence on the adoption of energy-efficient retrofit measures (EERMs) in residential buildings is critical to supporting the development of national and pan-European policies aimed at fostering the energy performance upgrade of the building stock. In this light, the aim of this paper is to advance in the understanding of the probabil...
Article
Full-text available
This paper assesses the effects on urban freight transportation of implementing Bus Rapid Transit (BRT) systems. BRT systems have been widely implemented in Latin American cities in recent decades, with positive results driven by their high capacity and relatively low cost. Implementing BRT strategic corridors has led to changes in land use, and ha...
Article
This paper presents a generalized Noortman and Van Es’ empty trips model that considers commodity groups and vehicle types. The model allows the analyst to quantify the contribution of empty trips by the various types of commodities. The model was validated using data collected in Colombia as part of the national Freight Origin-Destination Survey....
Article
Full-text available
The first in a series of two, this paper conducts a review of the public-sector initiatives that could be used to improve freight activity in metropolitan areas; collects data about initiatives that have been implemented and their performance; and produces a ranking of suggested initiatives. The review of public-sector initiatives is based on a com...
Article
Full-text available
The second in a series of two, this paper conducts a review of the public-sector initiatives that could be used to improve freight activity in metropolitan areas, collects data about the initiatives that have been implemented and their performance, and produces a ranking of suggested initiatives. The review of public-sector initiatives is based on...
Chapter
Full-text available
Public authorities are increasingly interested in fostering short food supply chains. Starting by increasing the share of local and organic food in school canteens has a big potential but requires the redesign of the physical distribution system to make short food supply chains competitive and sustainable. Food Hubs (FH) have been identified in the...
Article
This paper summarizes the research conducted by the authors concerning the development of an analytical freight demand model that explicitly considers freight pickup and delivery flows by industry sector, the multiclass tour flow model (MC-TFM). The mathematical properties of the resultant model are investigated, including the convexity of the opti...
Article
Full-text available
This paper uses data from a major logistics service provider in Gothenburg (Sweden) to (i) identify the different activities in a typical urban distribution tour, (ii) quantify the time required by drivers to perform each of these activities, and (iii) identify potential initiatives to improve time efficiency. To do so, the authors collected GPS da...
Article
When planning routes for fleets of electric commercial vehicles, it is necessary to precisely predict the energy required to drive and plan for charging whenever needed, in order to manage their driving range limitations. Although there are several energy estimation models available in the literature, so far integration with Vehicle Routing Problem...
Presentation
Full-text available
Urban freight and urban planning co-exist in tension: the current urban paradigm induces freight demand in city centres, but due to restrictions logistic operations become inefficient and costly. For strategic planning there is a need to better understand the interactions between urban form and freight demand. We need freight demand models that int...
Poster
Full-text available
This research aims to incorporate urban form characteristics in freight trip generation (FTG) models, and thus enable more interaction between practitioners through integration of their instruments and policies. From this perspective, the research addresses two questions: • To what extent does the urban form profile of a location influence the frei...
Article
Full-text available
This paper studies freight demand patterns of establishments in the accommodation and food services sector, and the potential of implementing urban freight strategies in this sector to improve local and city traffic conditions. This research uses data from the City of Stockholm and assesses the potential implementation of two strategies (i.e., cons...
Conference Paper
Full-text available
The aim of the paper is to analyze, via a scenario assessment, which are the needs and requirements to carry out an evaluation of the logistics organization for a local and organic supply logistics schemas. In other words, we aim to assess the potential of increasing local production in institutional catering logistics systems. First, the backgroun...
Article
This paper analyzes the impacts of aggregation level and category construction on the relevance and quality of freight trip generation (FTG) models. More precisely, constant generations and functional form models are compared, as well as activity and activity-workforce categories. The paper proposes a method to compare constant generation and funct...
Article
Full-text available
Purpose: This paper seeks to pilot test a novel way to collect freight and service activity data and analyze the collected data in the metropolitan area of Medellin, Colombia. Methods: This research collects data using a multi-layer and multi-actor approach that includes surveys to receivers, suppliers, carriers, and truck drivers. The data are use...
Chapter
This chapter aims to raise awareness about the importance of the specific consideration of the needs of Freight and Service Activity (FSA) in transportation planning and management efforts. It also aims to exemplify the potential application of establishment‐level FSA models to support these efforts. FSA encompasses a wide range of activities perfo...
Article
In recent years, the location of logistics facilities, in particular with regard to “logistics sprawl,” has emerged as a topic in the literature that is, a process of spatial decentralisation of logistics facilities in large metropolitan areas. The aim of this paper is to look at logistics sprawl patterns in the Gothenburg metropolitan area, in the...
Article
The New York City Off-Hour Delivery (NYC OHD) program is the work of a private-public-academic partnership - A collaborative effort of leading private-sector groups and companies, public-sector agencies led by the New York City Department of Transportation, and research partners led by Rensselaer Polytechnic Institute. The efforts of this partnersh...
Presentation
Full-text available
Traditional urban planning processes have limited interaction between different silos: urban environments and land-use ordinance are designed to fulfil community and economic needs; and infrastructure is planned to satisfy future residents demands based on existing and expected demographics. Some consequences of this lack of integration are the dis...
Article
The paper provides insight into a comparison of the parking practices and problems of freight-vehicle drivers in Gothenburg, Sweden, and Delhi, India. The purpose of this study is to understand how parking problems are related to relevant characteristics of the study zones, e.g., geographical location, transport mode used for last-mile deliveries,...
Article
This paper describes the chief findings of research conducted to assess the willingness of receivers of supplies to accept unassisted off-hour deliveries (U-OHD), which are those conducted outside regular business hours and without the assistance of the receiving establishment staff. U-OHD have potential to increase economic competitiveness, reduce...
Article
Full-text available
The paper defines the field of Freight Demand Management (FDM) and positions it in the broad range of public sector initiatives aimed at improving urban freight activity. To illustrate the magnitude of the impacts of FDM, the paper estimates the contributions to freight traffic by the various industry sectors in a sample of metropolitan areas, esta...
Article
Full-text available
This paper presents an attitudinal study conducted in Brasilia FD (Brazil). Carrier managers are inquired about their operational characteristics, problems faced on urban freight distribution, and a set of city logistics initiatives (CLI). The respondents are also asked about their perception on external factors affecting the implementation of thes...
Poster
Full-text available
This research: - Proposes a hybrid methodology with elements from urban form (i.e., street network analysis such as centrality measurements, connectivity, and density) and freight transportation engineering (i.e., freight trip generation data and models). - Assesses the role of urban form on freight trip generation using the metropolitan area of Go...
Conference Paper
Full-text available
This paper studies the implication of aggregating establishments by categories with different levels of detail for modeling urban freight trip generation. To this effect, the authors use a dataset of 2.970 establishments collected in 1998-1999 in France to conduct a formal assessment of FTG patterns homogeneity inside the traditional activity-based...
Article
This study discusses freight trip generation of pure receiver establishments, establishments that only receive goods, and freight intermediaries, establishments that both receive and ship goods. In addition, freight trip attraction and freight trip production patterns of establishments in different industry sectors were compared by using freight ge...
Article
This paper introduces a model of urban freight demand that seeks to estimate tour flows from secondary data sources e.g., traffic counts, to bypass the need for expensive surveys. The model discussed in this paper, referred as Freight Tour Synthesis (FTS), enhances current techniques by incorporating the time-dependent tour-based behavior of freigh...
Article
The paper defines the field of Freight Demand Management (FDM), and positions it as an important component of transportation policy and management. To establish the rationale for FDM, the paper studies the effects of the agent interactions at the core of supply chains, and identifies the important role played by the receivers of supplies in determi...
Book
Full-text available
NCFRP Report 33: Improving Freight System Performance in Metropolitan Areas: A Planning Guide provides a regional public planning guide that identifies potential strategies and practical solutions for public and private stakeholders to improve freight movement system performance in diverse metropolitan areas. The Guide is intended to serve as a com...
Chapter
This chapter provides an overview of freight generation (FG) and freight trip generation (FTG) modeling for urban areas. To this effect, the authors discuss the literature, propose a logistical interpretation of FG and FTG, summarize the key factors for effective FG and FTG modeling, and describes the FTG models developed for New York City. The cha...
Article
Full-text available
The main objective of this paper is to gain insight into the interconnections between the decision to use electronic toll collection, the choice of time-of-travel, and comprehensive policies that enhance the effectiveness of time-of-day pricing. This is an important topic of research because of pricing’s potential role in transportation demand mana...
Article
Full-text available
This paper conducts an exploratory analysis of freight trip attraction and its relationship with key features of the urban environment. Using establishment level data, the authors explore the role of business attributes, as well as network and land use descriptors. The research uses data from 343 establishments from five different industry sectors...
Article
Full-text available
The main objective of this paper is to assess, and define ways to enhance, the transferability of freight trip generation (FTG) models. After presenting the key premises that should guide the development of FTG models, the paper assesses transferability in two different ways. The first one is through the analyses of how well representative FTG mode...
Conference Paper
The paper introduces a set of area based freight trip generation (FTG) models. In addition, the paper assesses the performance of the area and with employment based FTG models estimated by the authors in previous studies. The paper uses two samples of trip generation data from receiver and carrier companies in New York and New Jersey, collected in...
Conference Paper
This paper discusses the freight trip attraction (FTA) and freight trip production (FTP) patterns of establishments in different industry sectors. In additions, the paper compares the freight trip generation of pure receiver establishments, i.e., establishments that only receive goods, and intermediaries i.e., establishments that both receive and s...
Article
Critical infrastructure refers to the type of facilities, services, and installations (e.g., transportation, communication, energy systems) that are essential for the functioning of a community, city or country. This paper describes the findings of the research conducted to identify the transportation network critical facilities (road links) and it...
Chapter
This chapter discusses the techniques available for estimation of vehicle trips, both loaded and empty, using the output of commodity-based models. To this effect, the chapter analyses the interconnections between mode and vehicle choice and the generation of loaded trips. In doing this, the chapter establishes the importance of producing solid est...
Chapter
The main objective of this chapter is to provide a comprehensive overview of empirical findings and models that focus on urban freight tours. In doing so, the chapter provides background information; reviews the research literature; classifies the tour models in simulation, hybrid, and analytical models; discusses strengths and weaknesses of a samp...
Conference Paper
This paper describes and analyzes the chief results of an attitudinal survey regarding the willingness of receivers of urban deliveries to switch to un-assisted off-hour deliveries, i.e., deliveries that take place outside regular business hours without the assistance of staff of the receiving establishment, in response to a series of policy incent...
Conference Paper
Critical infrastructure refers to the type of facilities, services, and installations (e.g., transportation, communication, energy systems) that are essential for the functioning of a community, city or country. This paper describes the findings of the research conducted to identify the transportation network critical facilities (road links) and it...
Article
Full-text available
The effects of land use and business size (quantified as number of employees) on freight trip generation were analyzed. Standard trip generation rates, ordinary least squares, and multiple classification analysis were applied to a New York City data set. Three land use classification codes—the City of New York zoning resolution (NYCZR), the Land-Ba...
Article
Full-text available
This paper analyzes the impacts of spatial and temporal aggregation of empty trips models. The authors analyze five models of empty trips (Noortman and van Es, and four Holguin-Veras and Thorson empty trips models) for different aggregation levels of six national freight origin-destination (OD) matrices. They were collected by Colombia's Ministry o...
Article
Full-text available
This paper presents a brief description of vehicular congestion in Medellin, Colombia, and discusses the need to implement congestion pricing (CP) from an economic point of view. It describes the license plate-based traffic restriction (Pico y Placa) in the city, showing that the measure is palliative, and that the implementation of CP is necessary...
Book
Full-text available
TRB joint National Cooperative Freight Research Program (NCFRP) Report 19/National Cooperative Highway Research Program (NCHRP) Report 739: Freight Trip Generation and Land Use explores the relationship between freight trip generation and land use. The report consolidates available freight trip generation models in an electronic database to assist...
Article
Full-text available
Seven national freight origin-destination samples collected in Colombia from 1999 to 2005 were used to conduct an empirical investigation of the temporal stability of parameters of freight demand models in the short to medium term. Freight generation, freight distribution, and empty trip models were considered. To identify time-dependent effects, m...
Conference Paper
This paper compares two different industry classification systems used in freight trip generation (FTG) modeling, i.e. Standard Industrial Classification (SIC) and the North American Industry Classifications System (NAICS). The analysis focuses on the difference in the types of models generated and the models' ability to replicate the input data by...