Slow down and prepare for a very sharp turn. Chevron Alignment (Left). This sign indicates that the road will change direction sharply. Slow down to a safe speed. Main Road Curves to the Right Ahead. This sign indicates that the main road curves right with a side road entering from the left side in the curve.The blue ENS sign lists a telephone number to notify the railroad of an emergency warning device malfunction. If you see a problem at a crossing, call this number as soon as possible and provide the posted crossing number. Local law enforcement can also contact the railroad for you. Emergency Railroad Contacts .The 5 sided sign warns of. School zone or school crossings. Traffic signs are used to. Control traffic and pedestrians. A flashing yellow traffic signal at an intersection means. Slow down and proceed with caution. When can you disregard a signal given by a police officer directing traffic. Never. Exclusively to warn of existing or possible hazards on roadways or adjacent areas. Vertical Rectangle Generally for regulatory signs. Pentagon School advance and school crossing signs. Round Railroad advance warning signs. Crossbuck Railroad crossing. Octagon: Stop Signs are always octagonal (8 sided). A stop sign means that you must bring your ... The advanCe WaRning sign is usually the first sign drivers see when approaching a highway-rail intersection. This sign advises drivers to always slow down, look and listen and be prepared to stop for an approaching train. CRoSSbuCk signs are found at most highway-rail intersections. This sign is a warning of a railroad crossing. Look, listen, slow down and be prepared to stop for trains or any vehicles using the rails. Railroad crossbuck. If there is more than one track, the sign below the crossbuck will indicate the number of tracks at the crossing. Slow down and be prepared to stop.Study with Quizlet and memorize flashcards containing terms like 1. What are the meanings of the eight shapes of signs: octagon, triangle, vertical rectangle, pentagon, round, pennant, diamond, horizontal rectangle?, 2. What are the meanings of the eight colors used for traffic signs: Red, Yellow, White, Orange, Black, Green, Blue, Brown?, 3. What actions should you take at a STOP, YIELD, and ...Study with Quizlet and memorize flashcards containing terms like 1. What are the meanings of the eight shapes of signs: octagon, triangle, vertical rectangle, pentagon, round, pennant, diamond, horizontal rectangle?, 2. What are the meanings of the eight colors used for traffic signs: Red, Yellow, White, Orange, Black, Green, Blue, Brown?, 3. What actions should you take at a STOP, YIELD, and ...Some crossings have very little vehicular and train traffic. At such crossings it may not be cost effective to install and maintain gates or flashing lights. Decisions regarding the appropriate type of warning devices are made by the state highway officials. According to the Federal Railroad Administration, statistics show that most highway ... Round yellow warning signs alert motorists that there's a railroad crossing ahead. Warning signs are made with the highest quality .080 aluminum, coated with the industries best 3M or Avery reflective sheeting and printed to last beyond the sheeting warranty. Traffic Warning Signs; Object Markers; Railroad Signs; Crossing Signs; Dead End ... Railroad advance warning signs are: a) Red and triangular b) Black on white in the shape of an X c) Orange and diamond-shaped d) Yellow and round b) Black on white in the shape of an X An odd-numbered Interstate using single or double digit number indicates a route that: a) Runs in a loop around a city b) Extends outward from a loop around c ... At crossings there are signs with a toll-free number to call the railroad directly and warn them of stalled vehicles or other problems at the crossing. When crossing has more than one track, don't try to cross immediately after the end of the train passes -- there may be another train approaching on the second track.This round sign means RAILROAD CROSSING ahead. RAILROAD CROSSING signs are yellow with a black crossbuck X and the letters RR. It is an advance warning sign that means a railroad track will cross the roadway ahead. In rural areas the sign may be up to 750 feet in advance of the railroad crossing. Slow down, look and stop if necessary.A railway detonator (torpedo in North America) is a coin-sized device that is used as a loud warning signal to train drivers. It is placed on the top of the rail, usually secured with two lead straps, one on each side. When the wheel of the train passes over, it explodes, emitting a loud bang.W2-6 Roundabout Symbol Sign. $30.80. Select Options. Fast Nationwide Shipping. Due to supply chain shortages related to COVID-19 lead times may be longer than usual. Orders may take 2 - 10 business days to ship. Specialty items such as LED Flashing signs and Roll-Up Signs have extended lead times. If your project is time sensitive please ...This part of the road's shoulder can only be used for emergencies. Mileposts are located __ on interstate highways starting at the state line. Every mile. Railroad warning signs warn _____. If we are approaching or next to a railroad. Broken yellow lines separate _____. Two-way roads where you can legally pass. Call 800-848-8715 to report active railroad warning signal issues at particular crossings. Please provide the following information, if available: Note: The DOT number is a six digit number with an alpha character at the end (Ex.: 999 999A) and is found on the blue sign mounted on the crossbuck post for a passive crossing: it may be found on ...W2-6 Roundabout Symbol Sign. $30.80. Select Options. Fast Nationwide Shipping. Due to supply chain shortages related to COVID-19 lead times may be longer than usual. Orders may take 2 - 10 business days to ship. Specialty items such as LED Flashing signs and Roll-Up Signs have extended lead times. If your project is time sensitive please ... Unless otherwise posted, a speed limit of 100 kilometers per hour (kph) (62 miles per hour (mph)) applies to all vehicles on all highways and roads in Germany. True or False? False. Under certain circumstances, the maximum speed posted may be too fast for road and traffic conditions.Study with Quizlet and memorize flashcards containing terms like 1. What are the meanings of the eight shapes of signs: octagon, triangle, vertical rectangle, pentagon, round, pennant, diamond, horizontal rectangle?, 2. What are the meanings of the eight colors used for traffic signs: Red, Yellow, White, Orange, Black, Green, Blue, Brown?, 3. What actions should you take at a STOP, YIELD, and ...Study with Quizlet and memorize flashcards containing terms like Brown is used as a background color for guide and information signs related to points of recreation or cultural interest and on some street name signs., The shape of a circle is commonly used in California for advanced warning that means there is a railroad crossing ahead., You may cross over a solid yellow line to make a left ...Railroad reparations are an important part of keeping transportation running smoothly. Ensure your employees well-being with our wide collection of railroad safety signs and accessories. • Railroad Chocks hold trains still in one direction while loading and unloading. Also, chocks are required by OSHA whenever rail cars are being worked on.– Warning Signs and Devices . Advance Warning Signs. The round, black-on-yellow warning sign is placed ahead of a public railroad-highway crossing. The advance warning sign tells you to slow down, look and listen for the train, and be prepared to stop at the tracks if a train is coming. See Figure 2.15. Pavement markings mean the same as the ...– Warning Signs and Devices . Advance Warning Signs. The round, black-on-yellow warning sign is placed ahead of a public railroad-highway crossing. The advance warning sign tells you to slow down, look and listen for the train, and be prepared to stop at the tracks if a train is coming. See Figure 2.15. Pavement markings mean the same as the ... EXPLANATION: A school crossing sign is an example of a Warning sign. Warning signs are usually yellow, like curve ahead, school zone, low bridge, etc. School zones are indicated by regulator signs with the posted hours of operation and flashing yellow lights advising caution. The use of red on signs is limited to stop, yield, and prohibition signs. A white background indicates a regulatory sign; yellow conveys a general warning message; green shows permitted traffic movements or directional guidance; fluorescent yellow/green indicates pedestrian crossings and school zones; orange is used for warning and guidance in ...Jul 14, 2022 · Slow down and prepare for a very sharp turn. Chevron Alignment (Left). This sign indicates that the road will change direction sharply. Slow down to a safe speed. Main Road Curves to the Right Ahead. This sign indicates that the main road curves right with a side road entering from the left side in the curve. Study with Quizlet and memorize flashcards containing terms like Brown is used as a background color for guide and information signs related to points of recreation or cultural interest and on some street name signs., The shape of a circle is commonly used in California for advanced warning that means there is a railroad crossing ahead., You may cross over a solid yellow line to make a left ...DIAMOND: Exclusively to warn of existing or possible hazards on roadways or adjacent areas. VERTICAL RECTANGLE: Generally for regulatory signs. PENTAGON: School advance and school crossing signs. ROUND: railroad advance warning signs. CROSSBUCK: Railroad crossing. Octagon: Stop. Stop signs are always octagonal (8 sided).When approaching a train crossing, you’ll often see advance warning signs. (But not always!) The most common warning sign is a big yellow circle with an “X” and the letters “RR.”. No, the “RR” does not stand for RiRi. If the train is already on its way, you might see flashing red lights. SIGN SHAPES WARNING SIGNS These signs are yellow with black lettering or symbols and usually diamond shaped. These signs warn you to slow down and be prepared to stop if necessary because a special situation or a hazard is ahead. Some common warning signs are shown below. TRAFFIC CONTROL 31 Octagon = Stop Triangle = Yield Vertical Rectangle ...RAILROAD (TRAIN) CROSSINGS. Signs warn you that you are approaching railroad tracks. Look and listen for trains in both directions. Be ready to stop if necessary. You should expect a train on a track at any time, day or night. Never stop on a railroad track. Usually by the time a train sees you it will be too late for it to stop. The Federal Railroad Administration minimum warning time is 20 seconds. Many states issue orders specifying the designed warning time at each crossing. Designed warning times vary from the low 20s to the high 30s, depending on the circumstances at the crossing. In addition to the signals and signs, Federal rules require train crews to begin ... SIGN SHAPES WARNING SIGNS These signs are yellow with black lettering or symbols and usually diamond shaped. These signs warn you to slow down and be prepared to stop if necessary because a special situation or a hazard is ahead. Some common warning signs are shown below. TRAFFIC CONTROL 31 Octagon = Stop Triangle = Yield Vertical Rectangle ... A railway detonator (torpedo in North America) is a coin-sized device that is used as a loud warning signal to train drivers. It is placed on the top of the rail, usually secured with two lead straps, one on each side. When the wheel of the train passes over, it explodes, emitting a loud bang.a) Construction zone ahead. b) Hospital ahead. c) Railroad crossing ahead. d) Roundabout ahead. d) Roundabout ahead. What should you do if you see this sign? a) Come to a complete stop, proceed when you have the right-of-way. b) Slow down, yield proceed when you have the right of way. c) Come to a complete stop only if there is a vehicle coming ...true. Flashing green lights that are not traffic signals are sometimes used to warn you of an upcoming stop sign, railroad crossing, an upcoming signal light, pedestrian crossing, school zone, or construction zone. false. When you see a yellow light, you should slow down and stop before entering the intersection, if you can do so safely. Study with Quizlet and memorize flashcards containing terms like 1. What are the meanings of the eight shapes of signs: octagon, triangle, vertical rectangle, pentagon, round, pennant, diamond, horizontal rectangle?, 2. What are the meanings of the eight colors used for traffic signs: Red, Yellow, White, Orange, Black, Green, Blue, Brown?, 3. What actions should you take at a STOP, YIELD, and ...Nov 14, 2022 · C. Hazard warning sign. D. Yield sign. ANSWER: C. Diamond-shaped traffic signs warn you of hazards and specific road conditions ahead. A. Three-sided and yellow. B. Diamond shaped and orange. C. Round and yellow. D. Square and white. ANSWER: C. Circular (round) traffic signs mean there is a railroad crossing ahead. Slow down and prepare for a very sharp turn. Chevron Alignment (Left). This sign indicates that the road will change direction sharply. Slow down to a safe speed. Main Road Curves to the Right Ahead. This sign indicates that the main road curves right with a side road entering from the left side in the curve.the 25 sites with active advance warning signs to 81 high-speed signalized intersections without active advance warning signs, it was concluded that active advance warning signs were effective in reducing the frequency and severity of accidents when the major and minor road ADTs were above 15,000 and 3,000, respectively.Study with Quizlet and memorize flashcards containing terms like No left turn- Regulatory, Stop sign- Regulatory, Railroad tracks ahead- Warning and more. Fresh features from the #1 AI-enhanced learning platform. Exclusively to warn of existing or possible hazards on roadways or adjacent areas. Vertical Rectangle Generally for regulatory signs. Pentagon School advance and school crossing signs. Round Railroad advance warning signs. Crossbuck Railroad crossing. Octagon: Stop Signs are always octagonal (8 sided). A stop sign means that you must bring your ...SIGN SHAPES WARNING SIGNS These signs are yellow with black lettering or symbols and usually diamond shaped. These signs warn you to slow down and be prepared to stop if necessary because a special situation or a hazard is ahead. Some common warning signs are shown below. TRAFFIC CONTROL 31 Octagon = Stop Triangle = Yield Vertical Rectangle ... Railroad advance warning signs are: a) Red and triangular b) Black on white in the shape of an X c) Orange and diamond-shaped d) Yellow and round b) Black on white in the shape of an X An odd-numbered Interstate using single or double digit number indicates a route that: a) Runs in a loop around a city b) Extends outward from a loop around c ... a) green- Movement is permitted. b) yellow- General warning, caution. c) red- Stop or prohibition. Explain the type (s) of information communicated by the following sign colors. a) blue- Motorist services guidance. b) brown- Recreational/cultural guidance. c) orange- Temp work zone. d) pink- Incident management.true. Flashing green lights that are not traffic signals are sometimes used to warn you of an upcoming stop sign, railroad crossing, an upcoming signal light, pedestrian crossing, school zone, or construction zone. false. When you see a yellow light, you should slow down and stop before entering the intersection, if you can do so safely. Study with Quizlet and memorize flashcards containing terms like Brown is used as a background color for guide and information signs related to points of recreation or cultural interest and on some street name signs., The shape of a circle is commonly used in California for advanced warning that means there is a railroad crossing ahead., You may cross over a solid yellow line to make a left ...Rail Signs and Signals. You'll find these passive and active signs and traffic control devices along roads that cross railroad tracks before and at highway-rail grade crossings. Their purpose is to regulate, warn or guide traffic. They alert drivers to the presence of railroad tracks and to the possibility of an approaching train. Nov 10, 2022 · Pennant Road Signs. Pennant-shaped signs warn drivers that a no-passing zone is ahead. Diamond Road Signs. Diamonds are used for warning signs. Vertical Rectangle Road Signs. Vertical rectangle road signs are used to convey regulatory information, such as the speed limit. Pentagon Road Signs. Pentagons are used in school zones. Round Road Signs used to warn that there is a railroad crossing ahead RAILROAD WARNING. round sign shape. ... -this sign warn people behind it that it can only go 25MPH or lessMVA Learners Permit Test. Come to a complete stop at the stop line or, if there is no stop line, prior to the crosswalk and before entering the intersection, and remain stopped as long as the signal is red. Unless a sign prohibits turning on red, after coming to a complete stop, you may turn right or you may turn left from a one-way street to ... 2.3 WARNING SIGNS Warning signs are yellow with black lettering or symbols and most are diamond-shaped. These signs warn you to slow down and be prepared to stop if necessary; a special situation or hazard is ahead. Some common warning signs are shown below. INTERSECTION/ CROSSROAD There is another road ahead that crosses the road you are on. WatchAdvance Warning Sign. These signs warn you that railroad tracks are ahead. Watch out! This sign also tells you to slow down, look and listen because you may have to stop, and it shows which way the tracks cross the road. Quiet Zone. Trains do not blow their horns in these areas, but the engineer can still sound the horn in emergency situations. true. Flashing green lights that are not traffic signals are sometimes used to warn you of an upcoming stop sign, railroad crossing, an upcoming signal light, pedestrian crossing, school zone, or construction zone. false. A flashing red signal light has the same meaning as a stop sign. true. View some of the most common standard sign shapes in Richard C. Moeur's Manual of Traffic Signs.W2-6 Roundabout Symbol Sign. $30.80. Select Options. Fast Nationwide Shipping. Due to supply chain shortages related to COVID-19 lead times may be longer than usual. Orders may take 2 - 10 business days to ship. Specialty items such as LED Flashing signs and Roll-Up Signs have extended lead times. If your project is time sensitive please ...– More than 50% have automatic warning systems • 34.7% have flashing lights and gates • 15.5% have flashing lights – More than 60% of collisions occur at crossings with automatic warning systems. • Almost 80,500 private at highway-grade crossings – Most do not have automatic warning devicesDIAMOND: Exclusively to warn of existing or possible hazards on roadways or adjacent areas. VERTICAL RECTANGLE: Generally for regulatory signs. PENTAGON: School advance and school crossing signs. ROUND: railroad advance warning signs. CROSSBUCK: Railroad crossing. Octagon: Stop. Stop signs are always octagonal (8 sided). Study with Quizlet and memorize flashcards containing terms like No left turn- Regulatory, Stop sign- Regulatory, Railroad tracks ahead- Warning and more. Fresh features from the #1 AI-enhanced learning platform.Several warning signs are in place along Onondaga Lake Parkway to help prevent tractor trailers from crashing into the low railroad bridge. Data from the New York Department of Transportation ...Slow down and prepare for a very sharp turn. Chevron Alignment (Left). This sign indicates that the road will change direction sharply. Slow down to a safe speed. Main Road Curves to the Right Ahead. This sign indicates that the main road curves right with a side road entering from the left side in the curve.Study with Quizlet and memorize flashcards containing terms like No left turn- Regulatory, Stop sign- Regulatory, Railroad tracks ahead- Warning and more. Fresh features from the #1 AI-enhanced learning platform.The advanCe WaRning sign is usually the first sign drivers see when approaching a highway-rail intersection. This sign advises drivers to always slow down, look and listen and be prepared to stop for an approaching train. CRoSSbuCk signs are found at most highway-rail intersections. Advance Warning Signs: These signs are large circles with a yellow background, a black X in the middle and an R on each side. These warn the driver that the road crosses over tracks. These are primarily used to remind the driver to slow down, then look and listen for a train before going over the cross way. No Train Horn: These are rectangular ... the 25 sites with active advance warning signs to 81 high-speed signalized intersections without active advance warning signs, it was concluded that active advance warning signs were effective in reducing the frequency and severity of accidents when the major and minor road ADTs were above 15,000 and 3,000, respectively. RAILROAD (TRAIN) CROSSINGS. Signs warn you that you are approaching railroad tracks. Look and listen for trains in both directions. Be ready to stop if necessary. You should expect a train on a track at any time, day or night. Never stop on a railroad track. Usually by the time a train sees you it will be too late for it to stop. This sign is most commonly used in California for advance warning that means there is a railroad crossing ahead. shape of a crossbuck This shape of a crossbuck is used exclusively to warn of a railroad crossing. Crashes at grade crossings equipped with warning devices often involve motorists who drive around gates or across railroad tracks while flashing lights are warning them that a train is approaching. This noncompliant behavior may be due to the motorists’ expectations of train arrival time following activation of gates and lights as well as the ...Crashes at grade crossings equipped with warning devices often involve motorists who drive around gates or across railroad tracks while flashing lights are warning them that a train is approaching. This noncompliant behavior may be due to the motorists’ expectations of train arrival time following activation of gates and lights as well as the ...Advance Warning Sign. These signs warn you that railroad tracks are ahead. Watch out! This sign also tells you to slow down, look and listen because you may have to stop, and it shows which way the tracks cross the road. Quiet Zone. Trains do not blow their horns in these areas, but the engineer can still sound the horn in emergency situations. Warning Railroad Crossing Interstate Highway Many of these warning signs use the same symbols as yellow warning signs, but you should take extra care when orange signs are posted. Traffic and road conditions around work zones often change quickly. In addition to posting orange warning signs, road work crews can use a number ofDIAMOND: Exclusively to warn of existing or possible hazards on roadways or adjacent areas. VERTICAL RECTANGLE: Generally for regulatory signs. PENTAGON: School advance and school crossing signs. ROUND: railroad advance warning signs. CROSSBUCK: Railroad crossing. Octagon: Stop. Stop signs are always octagonal (8 sided). Study with Quizlet and memorize flashcards containing terms like Brown is used as a background color for guide and information signs related to points of recreation or cultural interest and on some street name signs., The shape of a circle is commonly used in California for advanced warning that means there is a railroad crossing ahead., You may cross over a solid yellow line to make a left ...a) green- Movement is permitted. b) yellow- General warning, caution. c) red- Stop or prohibition. Explain the type (s) of information communicated by the following sign colors. a) blue- Motorist services guidance. b) brown- Recreational/cultural guidance. c) orange- Temp work zone. d) pink- Incident management.The test includes 100 questions about regulatory signs, warning signs, work zone signs, guide signs and service signs. The official DMV written test is designed to also check your knowledge of traffic laws, road rules and safe driving practices. So, after taking this road signs test, be sure to check our comprehensive set of DMV practice tests.Nov 14, 2022 · C. Hazard warning sign. D. Yield sign. ANSWER: C. Diamond-shaped traffic signs warn you of hazards and specific road conditions ahead. A. Three-sided and yellow. B. Diamond shaped and orange. C. Round and yellow. D. Square and white. ANSWER: C. Circular (round) traffic signs mean there is a railroad crossing ahead.
A warning sign is a type of sign which indicates a potential hazard, obstacle, or condition requiring special attention. Some are traffic signs that indicate hazards on roads that may not be readily apparent to a driver. [1]. Reviews moe
Advance Warning Signs: These signs are large circles with a yellow background, a black X in the middle and an R on each side. These warn the driver that the road crosses over tracks. These are primarily used to remind the driver to slow down, then look and listen for a train before going over the cross way. No Train Horn: These are rectangular ... At crossings there are signs with a toll-free number to call the railroad directly and warn them of stalled vehicles or other problems at the crossing. When crossing has more than one track, don't try to cross immediately after the end of the train passes -- there may be another train approaching on the second track. Nov 14, 2022 · C. Hazard warning sign. D. Yield sign. ANSWER: C. Diamond-shaped traffic signs warn you of hazards and specific road conditions ahead. A. Three-sided and yellow. B. Diamond shaped and orange. C. Round and yellow. D. Square and white. ANSWER: C. Circular (round) traffic signs mean there is a railroad crossing ahead. The active advance warning sign (AAWS) consists of one or two 12-inch yellow hazard identification beacons mounted above the advance warning sign, as shown in Figure 39. An advisory speed plate sign indicating the safe approach speed also should be posted with the sign. 94 The AAWS provides motorists with advance warning that a train is ... At crossings there are signs with a toll-free number to call the railroad directly and warn them of stalled vehicles or other problems at the crossing. When crossing has more than one track, don't try to cross immediately after the end of the train passes -- there may be another train approaching on the second track.with “passive warning devices” (such as crossbucks, stop signs and yield signs). Trains often require a mile or more to stop, and they cannotdeviate from their course. That is why safety at grade crossings, by its nature, is primarily a motorist’s responsibility. The warning devices are there to protect motorists, not trains. Railroad Warning: Used to warn that there is a railroad crossing ahead. Sign Shapes: Crossbuck Highway-Rail Grade Crossing: Identifies the location of a railroad crossing.1. you are directed to do so by a flag person 2. there are flashing red lights or warning bells sounding 3. there is any warning device telling you a train is coming Solid and broken lines A solid yellow line on your side of the road might say no passing zone.2.3 WARNING SIGNS Warning signs are yellow with black lettering or symbols and most are diamond-shaped. These signs warn you to slow down and be prepared to stop if necessary; a special situation or hazard is ahead. Some common warning signs are shown below. INTERSECTION/ CROSSROAD There is another road ahead that crosses the road you are on. Watchthis sign is a warning of a railroad crossing. Look, listen, slow down and be prepared to stop for trains or any vehicles using the rails. Trains may be approaching from either direction. If there is more than one track, trains may be approaching from either direction on either track.When approaching a train crossing, you’ll often see advance warning signs. (But not always!) The most common warning sign is a big yellow circle with an “X” and the letters “RR.”. No, the “RR” does not stand for RiRi. If the train is already on its way, you might see flashing red lights.Signs warn you that you are approaching railroad tracks. Look and listen for trains in both directions. Be ready to stop, if necessary. You should be prepared for a train to come at any time, day or night. Never stop on railroad tracks. Usually by the time a train conductor sees you, it is too late for the train to stop. Answers. Be ready to drive faster than the train. Be prepared to stop if a train is nearby. Look for a way around any lowered gates. Assume no trains are nearby and continue driving normally. Railroad crossing warning signs are used to warn drivers of the possibility of a train. Drivers should obey all railroad crossing warning signs and never ... Signs warn you that you are approaching railroad tracks. Look and listen for trains in both directions. Be ready to stop, if necessary. You should be prepared for a train to come at any time, day or night. Never stop on railroad tracks. Usually by the time a train conductor sees you, it is too late for the train to stop. Railroad warning signs warn _____. A.) If a train is approaching B.) If it's time to make a dancing train C.) If it is not safe to cross the tracks D.) If you are approaching or next to a railroad• The driver fails to observe and obey the advance railroad warning sign and other warning signs and signals. • While driving at night or in an unfamiliar location, the driver travels at a speed too great and cannot stop in time or drives in front of a train. • Radio, cell phones and other distractions avert the driver’s attention.The 5 sided sign warns of. School zone or school crossings. Traffic signs are used to. Control traffic and pedestrians. A flashing yellow traffic signal at an intersection means. Slow down and proceed with caution. When can you disregard a signal given by a police officer directing traffic. Never.SIGN SHAPES WARNING SIGNS These signs are yellow with black lettering or symbols and usually diamond shaped. These signs warn you to slow down and be prepared to stop if necessary because a special situation or a hazard is ahead. Some common warning signs are shown below. TRAFFIC CONTROL 31 Octagon = Stop Triangle = Yield Vertical Rectangle ....