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Roadway Vertical Alignments Author: Gregory Taylor Roadway vertical alignments are a combination of parabolic curves and connecting tangent grades. Along with the roadway cross section (lanes and shoulders, curbs, medians, roadside slopes and ditches, sidewalks) and horizontal alignment (tangents and curves), the vertical alignment (grades and vertical curves) helps... Learn More

Roadway Geometric Design 5 Author: Gregory Taylor This course is the last in a series of five volumes that summarizes and highlights the geometric design process for modern roads and highways. Subjects covered include: interchanges (types, warrants); and grade separation structures (overpasses, underpasses). The contents of this document are... Learn More

Roadway Geometric Design 4 Author: Gregory Taylor This course is the fourth in a series of five volumes that summarizes and highlights the geometric design process for modern roads and highways. Subjects covered include: intersection types; alignments; profiles; sight distance; and roundabouts. The contents of this document are intended... Learn More

Roadway Geometric Design 3 Author: Gregory Taylor This course is the third in a series of five volumes that summarizes and highlights the geometric design process for modern roads and highways. Subjects covered include: traffic barriers; local roads; collector roads; rural and urban arterials; and freeways. The contents of... Learn More

Roadway Geometric Design 2 Author: Gregory Taylor This course is the second in a series of five volumes that summarizes and highlights the geometric design process for modern roads and highways. Subjects covered include: vertical alignments (grades, curves, design controls); and roadway cross-sections (lanes, shoulders, curbs, slopes). The contents... Learn More

Roadway Geometric Design 1 Author: Gregory Taylor This course is the first in a series of five volumes that summarizes and highlights the geometric design process for modern roads and highways. Subjects covered include: highway functions (classification systems); design controls and criteria (design vehicles, highway capacity, traffic characteristics); and... Learn More