Pan Danetian Highway
The Pan Danetian Highway is an international network of high speed super highways. They have multiple lanes of traffic in each direction, separated by a central barrier with grade-separated junctions. Access is restricted to certain types of motor vehicles. The highway connects adjacent members of the Pan Danetian League. Autostrada is a colloquial name for the Pan Danetian Highway used in Etruria.
Highway construction follows strict design and construction standards established by the Pan Danetian League.
- Controlled Access—All access onto and off the highway is to be controlled with interchanges and grade separations.
- Graded Acceleration and Deceleration Lanes—All access points must have designated acceleration lanes providing adequate distance and/or negative grade to reach safe highway speeds. All exit points must provide a designated deceleration lane providing adequate distance and/or positive grade to slow to exit speeds.
- Minimum Design Speed—Must permit an average speed of 90 mph (150 kph) under perfect conditions. Recommended safe speeds must be posted when terrain forces lower design speeds.
- Maximum Grade—Not to exceed 4% positive or negative grade. Climbing lanes or emergency escape lanes must be provided if 4% grade must be exceeded.
- Minimum Number of Lanes—Two lanes in each direction.
- Minimum Lane Width—Minimum of 12 ft (3.62 m).
- Shoulder Width—Minimum left shoulder width of 8 ft (2.4 m). Minimum right shoulder of 4 ft (1.2 m). Shoulder must be clear and level. May or may not be paved.
- Pavement Cross Slope—Minimum cross slope of 1.5%. Preferred cross slope of 2%. Recommended 2.5% cross slope in regions with heavy rainfall.
- Minimum Median Width—Minimum median width of 10 ft (3 m).
- Prohibited Vertical Curbs
- Vertical Clearance—Minimum vertical clearance of 17 ft (5.1 m)
- Horizontal Clearance—Minimum horizontal clearance is 42 ft (6.7 m) in each direction allowing for two lanes and shoulders.
- Rest Stops—Rest stops must be built every 250 mi (400 km) or less with full service stops every 500 mi (800 km) or less.
Major Direction Signs are large blue signs with a white border and text. The name of the destination is displayed prominently and as large as space allows. There are three types of major directional signs: exit, orienting, and lane determining. An exit sign has a double directional pointer oriented to the upper right corner indicating the upcoming exit. The sign will be displayed a minimum of two miles (3.2 kilometers) before the exit, although additional signs may be posted at a different interval. An exit number indicates the mile marker nearest the exit, but not past the exit. Mile markers are reset to zero at border crossing. Orienting signs have a double directional pointer oriented directly up to indicate an upcoming prominent destination. There are no mile markers associated with orienting signs. These are often used following interchanges to confirm the driver has selected the proper highway. A lane determining sign has a double directional pointer oriented directly down pointing to the appropriate lane choice for the destination. This may be used for interchanges, exit points, access points, climbing and escape lanes. A lane determining sign must be displayed a minimum of two miles before the exit. Identifier boxes centered in the lower half of the sign indicate associated highway numbers or pertinent information (such as services available), if applicable.
Minor Direction Signs are small blue signs with a white border and text. The name of the destination is displayed prominently and as large as space allows followed by the exit number indicating the mile marker nearest the exit. Minor direction signs will be displayed a minimum of two miles before the exit. Minor direction signs are often used in situations not requiring the more expensive major direction signs. They are often used to identify minor exit points, access points, and rest stops.
Direction to PDH Signs are small blue signs with a white border and text and shows the direction to the nearest Pan Danetian Highway access point, the name of the nearest major city where the highway ends, the highway number identifier and the average cardinal direction of the highway route.
Speed Limit Signs show the recommended or required maximum speed for road conditions based on nonstandard design limit speed or national speed limit. The top number is speed in miles per hour and the bottom number is speed in kilometers per hour. A national speed limit is posted inside a red circle (shown above). A recommended speed is shown within a white circle (resembling the no speed restriction sign).
No Speed Restriction indicates that there is no speed restriction or that the recommended speed restriction has ended.
National Border indicates the point where the highway crosses a national border. The country being entered is on top, while the country being left is on bottom.
Information Sign, posted at country borders, indicates the speed limit inside city limits, outside city limits, and on the Pan-Danetian Highway, if applicable.