PDF Live stop-controlled intersection data collection

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The Virginia Transportation Research Council, a partnership of the Virginia Department of Transportation and the University of Virginia, has.
Table of contents

Current yellow and all-red time shall not be decreased. D Saturation flow rates greater than passenger cars per hour per lane shall not be used unless specifically measured at that location. E Peak Hour Factors greater than 0. F Arrival Type 3 random arrivals shall be used in signalized intersection analysis unless specific measurements at that intersection indicate otherwise. G Signal Progression shall be analyzed in all cases where either a new signal or a change in signal timing is proposed on a roadway with more than two traffic signals including the new signal, if appropriate in the space of one mile.

A minimum greenband width equal to 40 percent of the cycle length shall be maintained on all arterials, at a progression speed within five miles per hour of the posted speed limit. H Any proposed signal timing shall provide adequate green time for pedestrians to cross all legs in all directions, at a speed of 4 feet per second, plus a six-second cushion. I All calculations and analysis results should be reasonable, understandable, consistent, and fully explained. J The conclusions presented in the TIA shall be consistent with and supported by the data, calculations, and analysis in the report.

If any portion of the study area falls within another jurisdiction such as a state highway or a city , consult that jurisdiction to determine the number of additional copies that they will need for their review. L The attached checklist will be used by County staff to determine if a TIA contains sufficient information to be reviewed.

Acceptance for review does not certify adequacy and is in no way an approval. Additional information may be required after acceptance of the TIA for review. M Cooperation between the applicant, the applicant's traffic engineer, and County staff is strongly encouraged throughout the TIA process. The applicant or applicant's traffic engineer should not hesitate to contact County staff if any uncertainties should arise.

See TIA Checklist. Traffic Impact Analysis Requirements. Side Menu. Page Content Left. Page Content. B Any proposed zone change that, in typical build-out scenarios, can be reasonably expected to generate more than vehicle trip ends more than the previous zoning during a single day C Any development within the Urban Growth Boundary of a city if the development would meet that city's criteria for requiring a Transportation Impact Analysis.

Four Corners Intersection

A Transportation Impact Analysis may be required for: A Any proposed development that can be reasonably expected to generate more than vehicle trip ends during a single day or more than 40 vehicle trip ends during a single hour. Calculation Of Trip Generation And Distribution Trip generation data provided in the most recent edition of the ITE publication Trip Generation should be used unless more appropriate data is available. E Any other intersections adjacent to the subject property.

Horizon Year The horizon year of a Transportation Impact Analysis is the most distant future year that shall be considered in the Transportation Impact Analysis. Transportation Impact Analysis TIA Report Requirements The preparer is encouraged to coordinate preparation with County staff and staff from other jurisdictions, as appropriate to ensure that all necessary components are included in the TIA and to reduce TIA revision and review time.

In order to be reviewed, the Transportation Impact Analysis TIA report shall include at least the following minimum components incomplete reports will be returned to the applicant's representative for completion : 1 The TIA report shall be signed and stamped by a Professional Civil or Traffic Engineer registered in the state of Oregon. Using this as a yardstick, one high school psychology class in Oliver watched intersections in that town during lunch hour.

They found that drivers who met this criteria could be counted on both hands as the vast majority did not. Rather than report no stop and rolling stop, which are effectively the same thing, it might be more appropriate to report no stop and stopping in an improper position. One question shows a car facing a stop sign stopped at an angle across the marked crosswalk and asks why this driver has made the wrong decision. The most popular incorrect response is because the driver did not stop at the stop sign.

Even though they have been driving for a very long time some students are surprised to find out that the position of the stop sign has nothing to do with where you must stop. Where to stop is determined by what you find at the intersection.

Traffic Signals

If there is a stop line, you must stop before you cross it. If there is only a marked crosswalk, you must top before crossing the edge.


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When there are no markings, you must stop before you encroach on the path of cross traffic. When drivers do stop, they tend to stop where they can see cross traffic rather than where they are supposed to. This does make it easier for them to continue, but can have serious consequences for cyclists and pedestrians if the driver is only paying attention to vehicular traffic. It also presents a difficulty for defensive drivers approaching the intersection with the careless driver on their right.

Will the driver stop or not? Do I continue or should I take evasive action? At these kind of intersections, it's his right of way too!

Residential: Uncontrolled Intersections

Because look, there's a crosswalk, but no pedestrian signal. As if the existence of that crosswalk automatically gives pedestrians right of way, regardless of the situation.

To Get Safer Streets, Traffic Lights and Stop Signs Aren’t the Answer – Streetsblog New York City

But let's take a look at Section of the MVA. Specifically, this:. And at these types of intersections, there never is a pedestrian traffic control signal , except for the one allowing pedestrians to cross the main road while the traffic light is red. Create an Account - Increase your productivity, customize your experience, and engage in information you care about.

The four single lane approaches are under an all-way stop control with Surfside Road, Sparks Avenue and Prospect Street approaches providing foot travel lanes and Atlantic Avenue only providing foot lanes. Sidewalks are provided along both sides of Surfside Road and Sparks Avenue, along the east side of Atlantic Avenue and along the south side of Prospect Street.

Most Recent

A marked crosswalk is provided on the east leg of the intersection across Sparks Avenue with school-crossing signs. This tree is located directly behind the existing curb line, approximately feet south of Sparks Avenue. The intersection is primarily surrounded by single family residential structures, with the exception being the Nantucket High School and Middle School located in the southeast area of the intersection. Recent analysis shows there have been a total of 6 crashes from through These crashes generally consisted of angle and rear-end type collisions.

These types of crashes can be attributed to the offset intersection geometry, sight distance constraints, and minimal roadway widths.

Intersection Watch

The intersection was found to have averaged less than two 2 reported motor vehicle crashes per year over the five-year review period with no fatalities. This alternative reconfigures the intersection to function as a single-lane "mini" modern roundabout with improved pedestrian and bicycle access. This alternative also provides a right-turn slip lane to accommodate Atlantic Avenue right turns to South Prospect Street for passenger cars and buses.

This slip lane is necessary to accommodate right turns from Atlantic Avenue to South Prospect Street due to the restricted existing roadway configuration approaching the intersection. The size of this roundabout is significantly smaller than a single lane modem roundabout, with a foot diameter center island and a foot travel lane for a total inscribed circle diameter of 70 feet.

To accommodate larger design vehicles, the center island and median delta islands at the approaches to the roundabout would be constructed of mountable materials i. It is expected that trucks could avoid these movements via alternative travel routes through the implementation of appropriately placed signage.