Improved Annual Average Daily Traffic (AADT) estimation for local roads using parcel-level travel demand modeling

Annual Average Daily Traffic (AADT) is a critical input to many transportation analyses. By definition, AADT is the average 24-hour volume at a highway location over a full year. Traditionally, AADT is estimated using a mix of permanent and temporary traffic counts. Because field collection of traffic counts is expensive, it is usually done for only the major roads, thus leaving most of the local roads without any AADT information. However, AADTs are needed for local roads for many applications. For example, AADTs are used by state Departments of Transportation (DOTs) to calculate the crash rates of all local roads in order to identify the top five percent of hazardous locations for annual reporting to the U.S. DOT. ^ This dissertation develops a new method for estimating AADTs for local roads using travel demand modeling. A major component of the new method involves a parcel-level trip generation model that estimates the trips generated by each parcel. The model uses the tax parcel data together with the trip generation rates and equations provided by the ITE Trip Generation Report. The generated trips are then distributed to existing traffic count sites using a parcel-level trip distribution gravity model. The all-or-nothing assignment method is then used to assign the trips onto the roadway network to estimate the final AADTs. The entire process was implemented in the Cube demand modeling system with extensive spatial data processing using ArcGIS. ^ To evaluate the performance of the new method, data from several study areas in Broward County in Florida were used. The estimated AADTs were compared with those from two existing methods using actual traffic counts as the ground truths. The results show that the new method performs better than both existing methods. One limitation with the new method is that it relies on Cube which limits the number of zones to 32,000. Accordingly, a study area exceeding this limit must be partitioned into smaller areas. Because AADT estimates for roads near the boundary areas were found to be less accurate, further research could examine the best way to partition a study area to minimize the impact.^

Miami Art Show, June 1, 1974

Dahlia Morgan with Charles Perry. In the late 1970s, FIU had an enrollment of less than 5,000 and two buildings made up the entire campus. Adjunct professor, at the time, Dahlia Morgan was asked to take over the art museum, which was then called the Visual Arts Gallery. During her long career with Florida International University, Dahlia Morgan transformed a modest student gallery on the Miami campus into an internationally celebrated art museum. In 1980, after teaching for five years in the visual arts department she accepted the directorship of the university’s Patricia & Phillip Frost Art Museum (formerly the Art Museum at FIU). As director and curator, Morgan instituted a lecture series, increased the frequency of exhibitions and developed numerous other programs including a student internship program. The Steven and Dorothea Green Critics’ Lecture Series was started by Morgan in 1981 and has now organized, hosted and presented over 100 lectures by internationally renowned artists, critics and scholars who include Pierre Rosenberg, former Director of the Louvre; Hilton Kramer, Art Critic; Helen Frankenthaler, American artist; and Michael Graves, architect and designer. In 1985 Morgan started the exhibition series “American Art Today,” which featured an annual examination of a specific subject or concept in American Art. Morgan curated and organized over 200 exhibitions during her directorship. Under Morgan, the Frost Art Museum grew to achieve local, national and international recognition as one of South Florida’s key cultural institutions. In 1999 the museum received accreditation from the American Association of Museums and in 2001 became an affiliate of the Smithsonian Institution. With the turn of the 21st Century the initiative to build a new facility took shape and in 2008, the new 46,000 square foot Patricia and Phillip Frost Art Museum opened to the public. Morgan is a four time National Endowment for the Arts Grants Panelist and member of the Art Basel Miami, Host Committee. She is listed in “Who’s Who in American Art” and in “Who’s Who of American Women.” Morgan’s largest accomplishment was seeing the completion of the 45,000 square foot Frost Art Museum built across from the Wertheim Performing Arts Center. Morgan’s fund raising techniques helped her raise over $12 million for its development. For 25 years, Morgan has served as director of FIU’s Frost Art Museum.

Miami Art Show, June 1, 1974

In the late 1970s, FIU had an enrollment of less than 5,000 and two buildings made up the entire campus. Adjunct professor, at the time, Dahlia Morgan was asked to take over the art museum, which was then called the Visual Arts Gallery. During her long career with Florida International University, Dahlia Morgan transformed a modest student gallery on the Miami campus into an internationally celebrated art museum. In 1980, after teaching for five years in the visual arts department she accepted the directorship of the university’s Patricia & Phillip Frost Art Museum (formerly the Art Museum at FIU). As director and curator, Morgan instituted a lecture series, increased the frequency of exhibitions and developed numerous other programs including a student internship program. The Steven and Dorothea Green Critics’ Lecture Series was started by Morgan in 1981 and has now organized, hosted and presented over 100 lectures by internationally renowned artists, critics and scholars who include Pierre Rosenberg, former Director of the Louvre; Hilton Kramer, Art Critic; Helen Frankenthaler, American artist; and Michael Graves, architect and designer. In 1985 Morgan started the exhibition series “American Art Today,” which featured an annual examination of a specific subject or concept in American Art. Morgan curated and organized over 200 exhibitions during her directorship. Under Morgan, the Frost Art Museum grew to achieve local, national and international recognition as one of South Florida’s key cultural institutions. In 1999 the museum received accreditation from the American Association of Museums and in 2001 became an affiliate of the Smithsonian Institution. With the turn of the 21st Century the initiative to build a new facility took shape and in 2008, the new 46,000 square foot Patricia and Phillip Frost Art Museum opened to the public. Morgan is a four time National Endowment for the Arts Grants Panelist and member of the Art Basel Miami, Host Committee. She is listed in “Who’s Who in American Art” and in “Who’s Who of American Women.” Morgan’s largest accomplishment was seeing the completion of the 45,000 square foot Frost Art Museum built across from the Wertheim Performing Arts Center. Morgan’s fund raising techniques helped her raise over $12 million for its development. For 25 years, Morgan has served as director of FIU’s Frost Art Museum.

Miami Art Show, June 1, 1974

In the late 1970s, FIU had an enrollment of less than 5,000 and two buildings made up the entire campus. Adjunct professor, at the time, Dahlia Morgan was asked to take over the art museum, which was then called the Visual Arts Gallery. During her long career with Florida International University, Dahlia Morgan transformed a modest student gallery on the Miami campus into an internationally celebrated art museum. In 1980, after teaching for five years in the visual arts department she accepted the directorship of the university’s Patricia & Phillip Frost Art Museum (formerly the Art Museum at FIU). As director and curator, Morgan instituted a lecture series, increased the frequency of exhibitions and developed numerous other programs including a student internship program. The Steven and Dorothea Green Critics’ Lecture Series was started by Morgan in 1981 and has now organized, hosted and presented over 100 lectures by internationally renowned artists, critics and scholars who include Pierre Rosenberg, former Director of the Louvre; Hilton Kramer, Art Critic; Helen Frankenthaler, American artist; and Michael Graves, architect and designer. In 1985 Morgan started the exhibition series “American Art Today,” which featured an annual examination of a specific subject or concept in American Art. Morgan curated and organized over 200 exhibitions during her directorship. Under Morgan, the Frost Art Museum grew to achieve local, national and international recognition as one of South Florida’s key cultural institutions. In 1999 the museum received accreditation from the American Association of Museums and in 2001 became an affiliate of the Smithsonian Institution. With the turn of the 21st Century the initiative to build a new facility took shape and in 2008, the new 46,000 square foot Patricia and Phillip Frost Art Museum opened to the public. Morgan is a four time National Endowment for the Arts Grants Panelist and member of the Art Basel Miami, Host Committee. She is listed in “Who’s Who in American Art” and in “Who’s Who of American Women.” Morgan’s largest accomplishment was seeing the completion of the 45,000 square foot Frost Art Museum built across from the Wertheim Performing Arts Center. Morgan’s fund raising techniques helped her raise over $12 million for its development. For 25 years, Morgan has served as director of FIU’s Frost Art Museum.