Infrastructure

Tandem Toll Booths for the Golden Gate Bridge

Hall, Randolph W.
Daganzo, Carlos F.
1983

Many toll plazas are constrained in width by buildings or other physical barriers. These barriers may make the cost of adding toll lanes prohibitive. One method for increasing the capacity of a toll facility without increasing its width is to use tandem toll booths. A tandem toll booth consists of two toll takers in a single toll lane both serving alternating sets of vehicles simultaneously. The capacity of tandem toll booths is calculated with time-space diagrams and the cumulative headway distributions of vehicles at a conventional toll booth. The capacity depends on the maximum of...

Assembly System Design Principles and Trade-offs

Blumenfeld, Dennis E.
Daganzo, Carlos F.
2025

Assembly System Design Principles and Tradeoffs

Daganzo, Carlos F.
Blumenfeld, D.E.
1994

This paper develops an analytical model to evaluate serial and parallel designs for an assembly system. The purpose is to identify when each design is cost-effective, using minimal data. The analysis shows that the design alternatives are based on a trade-off between labour and equipment utilization. Equations are derived for a simple system to illustrate this trade-off. Results indicate that the optimal trade-off depends simply on the ratio of labour to equipment costs. The trade-off analysis provides a first step towards establishing basic principles for assembly system design.

A Reliability-based Optimization Scheme for Maintenance Management in Large-scale Bridge Networks

Hu, Xiaofei
Daganzo, Carlos F.
Madanat, Samer
2015

Incorporating network configurations in bridge management problems is computationally difficult. Because of the interdependencies among bridges in a network, they have to be analyzed together. Simulation-based numerical optimization techniques adopted in past research are limited to networks of moderate sizes. In this paper, a simple framework is developed to determine optimal maintenance plans for large networks with many bridges. The objective is to minimize disruption, specifically, the extra travel distance caused by potential bridge failures over a planning horizon and under a budget...

Analytical Capacity Comparison of One-Way and Two-Way Signalized Street Networks

Gayah, Vikash V.
Daganzo, Carlos F.
2012

Recently cities have been converting traditional one-way downtown street networks to two-way operation partly because one-way networks are seen as confusing and as less conducive to economic activity and a livable environment and they require vehicles to travel longer distances on average. However, one of the main disadvantages of such conversions is thought to be a reduction in the network's ability to serve vehicles. Intersections in two-way networks can serve fewer vehicles per unit time than their one-way counterparts. Several studies have assessed the differences between these two...

On the Design of Public Infrastructure Systems with Elastic Demand

Daganzo, Carlos F.
2012

This paper considers the optimization of public infrastructure systems, recognizing that these systems serve multiple user classes. Example application domains include: public transportation systems, electricity distribution grids, urban water distribution systems, and maintenance of pavement and bridge systems. Under the guidance of a policy-making body, the analyst chooses both the system design, including its layout and control, and the prices to be charged for the service. The goal of the optimization is to maximize society’s welfare recognizing that the system’s performance will in...

A Reliability-based Optimization Scheme for Maintenance Management in Large-Scale Bridge Networks

Hu, Xiaofei
Daganzo, Carlos F.
Madanat, Samer
2015

Incorporating network configurations in bridge management problems is computationally difficult. Because of the interdependencies among bridges in a network, they have to be analyzed together. Simulation-based numerical optimization techniques adopted in past research are limited to networks of moderate sizes. In this paper, a simple framework is developed to determine optimal maintenance plans for large networks with many bridges. The objective is to minimize disruption, specifically, the extra travel distance caused by potential bridge failures over a planning horizon and under a budget...

Robust Feasibility for Control of Water Flow in a Reservoir-Canal System

Amin, Saurabh
Bayen, Alexandre M.
El Ghaoui, Laurent
Sastry, Shankar
2007

A robust control problem for distant downstream control of a reservoir-canal system modeled by Saint-Venant equations is investigated. The problem is to regulate the release of water at the upstream end such that the measured water level (or stage) at the downstream end does not deviate outside of prescribed bounds under the effect of downstream perturbations. Under the assumption of small perturbations, the Saint-Venant model is linearized around a steady state flow. The resulting linear model is discretized to obtain a linear state-space model using a method of characteristics based...

Preface

Bastin, George
Bayen, Alexandre M.
2009

Management of canal networks at the age of information technology. With the miniaturization of sensors and their decreasing costs, the paradigm of instrumentation of the built infrastructure and the environment has now been underway for several years, leading to numerous successful and sometimes spectacular realizations such as the instrumentation of the Golden Gate with wire- less sensors a few years ago. The convergence of communication, control and sensing on numerous platforms including multi-media platforms has enabled engineers to augment physical infrastructure systems with an...

Preface

Bastin, George
Bayen, Alexandre M.
2009

Management of canal networks at the age of information technology. With the miniaturization of sensors and their decreasing costs, the paradigm of instrumentation of the built infrastructure and the environment has now been underway for several years, leading to numerous successful and sometimes spectacular realizations such as the instrumentation of the Golden Gate with wire- less sensors a few years ago. The convergence of communication, control and sensing on numerous platforms including multi-media platforms has enabled engineers to augment physical infrastructure systems with an...