1.3 Schematic Development

1.3.1 Schematic Development Process

Refer to
TxDOT’s Project Development Process Manual (PDP)
for a comprehensive discussion of the schematic development process

1.3.2 Types of Schematics

The types of schematics that are discussed in detail in the PDP include:
  • Geometric Schematic
     – a geometric schematic that goes through a formal design, review and approval process is required for projects that are a:
    • New location project;
    • Added capacity project (including frontage roads);
    • Reconstruction with added ROW;
    • Interstate ramp relocation project;
    • Environmental Impact Statement project; or
    • Other projects that would require an IAJR.
    For high profile and politically sensitive projects, a geometric schematic is also recommended but not required.
    Refer to
    Chapter 4 of the PDP
    for more information about the Geometric Schematic
  • Geometric Layout
     – for projects that do not require the formal geometric schematic design, review, and approval process. This is a more simplified layout to convey project information and is used to gain feedback from project stakeholders. Refer to
    Chapter 4 of the PDP
    for more information.

1.3.3 Geometric Schematic Approval Process

Refer to
Chapter 4 of the PDP
for details concerning the submission, review and approval of schematics.