Shenzhen Dicolor Optoelectronics Co., Ltd. |
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Variable Message Led Traffic Signs Standard Highway Sign For Environmental
VARIABLE MESSAGE SIGNS, short for VMS. The phrase “VMS” is
referred to exclusively throughout the contents of this document.
However, other commonly used terms describing highway signs
that can display different messages are found within National and
New York State publication and policy documents. Examples of
these terms are as follows:
• “VMS” (Variable Message Sign) shall mean a device to display a variety of text messages to
motorists traveling the Thruway. It is a traffic control
device that typically suggests motorists alter their driving in
some manner and take appropriate actions. A VMS is not
typically used as a regulatory sign as recognized within the
MUTCD.
• “CMS” (Changeable Message Sign) shall mean a non-static sign that supports a limited
number of fixed messages. An example would be the
rotating drum sign used in E-ZPass operations. This term is
currently contained in the 2003 edition of the Federal MUTCD.
• “CEVMS” (Changeable Electronic Variable Message Sign) shall mean a changeable message sign of a digital/LED-LCD
display type that conforms to Federal and State statutes.
• “DMS” (Dynamic Message Sign) shall mean a changeable message sign as part of the
NTCIP (National Transportation Communication for ITS
Protocol).
• “BOARDS” shall mean changeable message signs as used in the Authority’s
Traffic Safety
VMS Application
Generally speaking, VMS is used to communicate in real-time with
motorists. VMS messages must address current conditions on
the roadway by being dynamic, accurate, timely and understandable.
When there are multiple requests to post VMS messages
simultaneously, messages will be prioritized in the following order
of importance:
1. Incident Management/Public Safety
2. Congestion Management/Motorist Guidance
3. Construction/Maintenance Activity
4. Special Events
5. Environmental
6. Law Enforcement Message
7. Public Service Campaign
VMS Small Knowledge:
When using text, care should be taken that the text can be read at
a sufficient distance. One rule of thumb is that the minimum
reading distance (in metres) is about 5 to 6 times the letter
height (in cm). For example: a 36-cm high letter can be read
at a distance of about 200 m from the sign.
When planning to install new VMS, authorities should know that the
European VMS standard (EN 12966) is obligatory for all fixed
VMS signs used in traffic applications. This is not yet
the case for temporary or mobile VMS because the Construction
Products Directive (CPD) is only valid for products that are
in permanent use. An informative appendix of the European
VMS standard (EN 12966) provides guidance in choosing the
correct combination of the various items mentioned above.
Feather
• Ultimate optical performance – exceeding the highest optical
classes according to EN 12966
• Conformity to EN 12966 : more than 100 class-combinations of
different color , luminosity , contrast , beam width , pixel pitch
, LEDs ,forward current , etc. have been tested and certified by
SGS/INTRON.
•Cutting edge performance – Anti-aliasing for picture smoothing ,
Optical System , Optimized Pixel Density , True Type Fonts ,Display
Luminance Intensity Regulation , Current Source Monitoring
Technology , Surface Mount LEDs – provide extraordinary advantages
over standard LED signs in situations where motorists have only a
brief period of time to absorb and react to information.
• Any application , any size , any interface , and any housing
execution ( front & rear access , walk-in ) – over 150
different modules available
• Connectable to any existing system – certified and proven
compliance with most widely use protocols (NTCIP , TCP/IP ,PROFIBUS
, XML-OPC , etc. ) ,customization to any user protocol ( numerous
examples of implemented projects )
• 100% customizable dimensions and pixel pitches
• Customizable as any other application-tailored display(size ,
pitch , optical proterties , consumption , service access ,
redundancy requirements , set of standardized accessories )
Specifications
TECHNICAL SPECIFICATIONS
Pixel pitch ( freely programmable VMS ) | P10 / P12 / P16 / P20 |
Color | Monochrome,duel-color,full-color |
Housing material | Aluminium or stainless Steel |
Paint coating | Dust polyester paint polymerized at 230℃ |
Loads | EN 12899-1 : 2007 |
Deflections | EN 12899-1 : 2007 |
Impact resistance | Pass |
Vibration resistance | Pass |
Passive safety | EN12767 |
OPTICAL SPECIFICATIONS
Luminance | L2,L3 ( according to EN 12966-1 ) |
Luminance ratio | R2 ,R3( according to EN 12966-1 ) |
Color | C2 ( according to EN 12966-1 ) |
Beam with | B1—B6 ( according to EN 12966-1 ) |
Uniformity | Pass |
Visible flicker | ≥90Hz |
ELECTRICAL SPECIFICATIONS
Input voltage | 230Vac±15% , 50Hz |
Electrical supply and limits | Pass |
Electrical safety | HD 60364-4-443 and HD 638 S1 |
PHYSICAL SPECIFICATIONS
Operating temperature range | T1 : -15℃ -- +60℃ T2 : -25℃ -- +55℃ |
Humidity | Up to 95% |
Ingress protection rating (IP) | IP65 |
Resistance to pollution | D3, D4 |
EMC
Emission | EN50293 |
Immunity | EN50293 |
SYSTEM FUNCTION
Interfaces | RS232,RS485,Ethernet,GPRS,3G |
Brightness Control | 256 level (automatic or manual) |
LED error detection | Open – circuit and Short - circuit |
Sensor | Temperature Sensor, Humidity Sensor,etc. |
Certification | CE,Rohs |