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TCRP Web-Only Document 53 105 APPENDIX D: TESTING PLAN
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From page 110... ...
TCRP Web-Only Document 53 106 As stated in the amplified work plan for this research project, two of the objectives of the research are to: "Identify potential supplemental safety measures for use with traffic signals in lieu of highway-light rail grade crossing flashing lights and gates where LRVs could operate at speeds in excess of 35 mph in a semi-exclusive public right-of-way"; and "Test higher-speed LRV operation (above 35 mph) at selected locations using identified supplemental safety measures." This chapter outlines the testing plan that could be implemented if the agency had agreed to participate.
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From page 111... ...
TCRP Web-Only Document 53 107 Prepare letter to FHWA requesting permission to experiment with alternative traffic control devices as well as an increase in LRV speeds to 40 mph. A copy of the letter can be found in Appendix B
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From page 112... ...
TCRP Web-Only Document 53 108 Installation of California Type Q Markers along the tracks in the vicinity of the crossings to guide vehicles away from the tracks during left turns from both the parallel and crossstreets; and Installation of an alternating Train Approaching (W10-7) / No Left Hand Turn blank-out sign for parallel left-turning vehicles to signify when LRT vehicles are approaching the crossing.
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From page 113... ...
TCRP Web-Only Document 53 109 Signal Timing Modifications The SAIC team will work with the City of San Jose to determine signal timing requirements to support an increase in train speeds from 35 to 40 mph. Increasing the speed of trains to 40 mph at the study intersections will require a longer window of opportunity for trains to cross, thus requiring longer green time on North First St.
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TCRP Web-Only Document 53 110 Figure 32. Graphical Representation of the Four Test Segments along the North First St.
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TCRP Web-Only Document 53 111 Metro / Airport station, accelerating to 35 mph through the crossing at Old Bayshore Hwy. Once the train has passed through the crossing at Old Bayshore Hwy., the train operator can accelerate to 40 mph prior to and through the crossing at Brokaw Rd.
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From page 116... ...
TCRP Web-Only Document 53 112 estimated to be approximately 400 feet, the train operator will be able to maintain a speed of 40 mph for approximately 2,150 feet. The 5 mph difference in speed over this distance equates to approximately 5 seconds of travel time savings between the two stations.
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