Peakhour 4 per device
Why was the previous MUTCD guidance that recommended yellow signal head housings eliminated?.How do the standards for traffic signals accommodate the needs of color-vision deficient drivers? Would it be better to add shapes to the signal indications to help the colorblind identify which signal is on?.Do the Institute of Transportation Engineers (ITE) Vehicle Traffic Control Signal Heads standards include the U-turn arrow signal indications?.Are there maintenance issues associated with LED-based signals?.Do traffic signal indications using light emitting diodes (LEDs) comply with the MUTCD?.Are strobe lights allowed in red signals?.Will FHWA adopt my safety idea into the MUTCD? I've invented a new type of signal device that gives an "early warning" of the impending signal change from green to yellow by flashing the green for a few seconds before yellow or by "counting down" the number of seconds until the yellow comes on.Where the cross street is one-way, can a vertical green arrow indication be substituted for circular green, to emphasize that wrong-way turns are not allowed into that one-way cross street?.Is it correct to assume that there is no need to be concerned about the "yellow trap" on an intersection approach where there is no separate left turn phase (that is, the left turn mode on that approach is "permissive only")?.What is the "yellow trap" and why is it a safety issue?.
In my State, turning right on a red arrow after stopping is legal. Then, in the 2003 MUTCD, the R10-17a (Right on Red Arrow After Stop) sign was added to go along with this. The 2000 MUTCD changed the meaning of a right turn red arrow signal by prohibiting right turns on a red arrow after stopping unless there is a sign specifically allowing it.If such a face is to be covered, are there any specific requirements about covering the yellow retroreflective backplate borders? In my jurisdiction, yellow retroreflective borders are used on the signal backplates of some signal faces. Sections 4D.01 and 4D.32 of the 2009 MUTCD refer to "covering" of signal faces as one of the acceptable methods for indicating a signal is not in operation.Where did the numbers for the Pedestrian Volume and School Crossing signal warrants come from?.Warrant #3 (Peak Hour Warrant) requires the use of data on "vehicle-hours of delay." How is this data measured and collected?.How can I obtain the formulas on which the curves in the graphs for signal warrants 2 (four-hour warrant) and 3 (peak hour warrant) are based?.
#PEAKHOUR 4 PER DEVICE INSTALL#
Why was a 56% column added to Table 4C-1, and will that make it more or less difficult to install a signal?.Why does the MUTCD allow the signal warrant volumes to be reduced to 70 percent of the normal values in certain conditions?.Where did the numbers come from for the vehicular volume signal warrants in the MUTCD?.If none of the numerical signal warrants are met at an intersection, is there ever any justification for installing a signal anyway?.Doesn't the MUTCD say that other factors beyond just the warrants have to be considered in the decision to install a signal? Some agencies' policy is that, whenever one or more of the numerical signal warrants are met, a signal will be installed.When analyzing the signal warrants, must the individual hourly volumes be for hours that all start "on the hour" (i.e., 6-7 am, 7-8 am, etc.)?.Should right-turn traffic from minor streets be counted in the traffic volume for signal warrant studies, or should it be disregarded?.