By U.S. Department of Transportation, Federal Highway Administration
This 2008 site visitors sign Timing handbook (TSTM) is meant to be a accomplished advisor to the site visitors sign timing engineer and technician on site visitors sign keep an eye on good judgment rules, practices, and strategies. The TSTM represents a synthesis of site visitors sign timing suggestions, analytical strategies, and functions in accordance with North American perform right into a unmarried book. The handbook additionally provides a framework for comparing site visitors sign timing purposes regarding upkeep and operations.
This guide is meant to enrich coverage files akin to the guide on Uniform site visitors keep an eye on units, and isn't meant to copy or substitute the street potential handbook, nationwide or neighborhood engineering records on sign timing, neither is it meant to function a regular or coverage record. particularly, it presents a precis of practices meant to aid practitioners within the timing of site visitors indications.
Content:
entrance topic
• record of Tables
• checklist of Figures
• desk of Contents
1. advent
2. sign Timing coverage
three. Operational and protection research
four. site visitors sign layout strategies
five. easy sign Timing technique and Controller Parameters
6. Coordination
7. constructing sign Timing Plans
eight. sign Timing upkeep: Operations and tracking
nine. complex sign Timing recommendations
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Extra info for Traffic Signal Timing Manual
Example text
Table 2-2 Signal Timing Process Examples Step Signal Timing Process Steps Single Intersection Field Adjustment Regional Signal Timing Optimization 1 Project Scoping Typical maintenance is performed on a routine basis A detailed scope of work is developed and the effort is completed every one to five years 2 Data Collection Phone call complaints may be the only step necessary, but could include other sources of data Turning movement counts, existing signal timing sheets, “before” travel time runs, signal timing policy, etc… 3 Model Development Field observation Build signal timing model, typically using a software tool like Synchro or TRANSYT-7F.
The context of the term policy is to support strategic objectives, and do not represent global applications in most cases. Engineering judgment should be used in concert with policy development and applications in the signal timing realm. This chapter describes the relationship between transportation policies and signal timing applications, summarized in Figure 2-1. S. Field Operations & Outcomes ~ CJO I I ~ P br Fee~b~~k I I I OS E o ~ Q ~ ~ Ql Q. I APPLICATION : ---------------------------, This chapter contains five sections.
The use of 20-year-old technology and infrastructure may satisfy the requirement for the signal to display green, yellow, and red, but it may not offer the opportunity to efficiently operate the system or provide preferential treatment for a certain type of user to meet the policies and desires of the community. In most cases, upgraded equipment improves the efficiency for staff to manage the system, assuming the staff is properly trained to operate the upgraded equipment. These efficiencies are observed with updating traffic signal timing plans, developing new strategies to improve transportation, and improving customer service.