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Mariposa / I- 19 Connector Route Study
Executive Summary
ADOT Contract No. T0849AQ001
Purchase Order No. PG KG3363 19 December 2008 Page i
Index for
Executive Summary
Page Number
Introduction 1
Background Information 1
Purpose & Need Statement 2
Project Overview 3
Study Area 3
Figure 1: Study Area 3
Existing Roadway Network 4
Figure 2: SR189 Area 4
Existing Conditions Analysis & Findings 5
Existing SR189 5
Current Traffic Patterns 6
Speed Limits 6
Future Conditions Analysis & Finding 6
Future Conditions Assessment 6
Traffic Forecast 7
Forecast for years 2020, 2030 & 2040 7
Level of Service 8
Existing and Future Conditions Assessment Summary 9
Alternatives Analysis 9
New Route Connecting the Mariposa Port of Entry to I- 19 9
Figure 3: Schematic Plan of the Study Alternatives 10
Evaluated Alternatives 11
Figure 4: Schematic Plan of the Study Alternatives 11
Alternative 1 – Upgrade Existing SR189/ Mariposa Road 12
Interchange Option A: Diverging Diamond In
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