Lane Connections
Tutorial
Lane connections are created as a type of driving restriction. They have some additional requirements beyond other driving restriction types:
- All roads with lane connections must have a LINK_ID attribute. The road LINK_ID will be used when creating lane connections.
- All roads with lane connections must have a LANE_CNT_F attribute. If the road does not have ONE_WAY set to 1 or Y, it also requires a LANE_CNT_R attribute.
- The map product must be built as NT.
Example intersection. Driving side is right. Links 1234 & 1289
travel from top to bottom; 1265 & 1261 left to right.
Lane connections are entered as a driving restriction of type "Lane Connection". Above is an image of an example four-way intersection with arrows showing all possible traversal paths.
- Lanes are numbered starting at "1" for the in-most lane and counting up for each successive outward lane.
- A lane may have multiple connections.
- Mapping are written as "from lane n umber > to lane number".
From the example image, the following attributes would be added to each link to represent all the possible lane traversals:
|
LINK_ID = 1234 |
||
|
Attribute |
Value |
Meaning |
|
LANE_CNT_F |
3 |
Link 1234 has three lanes when traveling from the reference node to the end node. |
|
LANE_CNT_R |
2 |
Link 1234 has two lanes when traveling from the end node to the reference node. |
|
RSTR1 |
Link Id: 1265; Lane Connection: 3>4 |
Lane 3 of link 1234 connects to lane 4 of link 1265. |
|
RSTR2 |
Link Id: 1289; Lane Connection: 3>2, 2>1 |
Lane 3 of link 1234 connects to lane 2 of link 1289. Lane 2 of link 1234 connects to lane 1 of link 1289. |
|
RSTR3 |
Link Id: 1261; Lane Connection: 1>1 |
Lane 1 of link 1234 connects to lane 1 of link 1261. |
|
LINK_ID = 1265 |
||
|
Attribute |
Value |
Meaning |
|
LANE_CNT_F |
4 |
Link 1265 has four lanes when traveling from the reference node to the end node. |
|
LANE_CNT_R |
3 |
Link 1265 has three lanes when traveling from the end node to the reference node. |
|
RSTR1 |
Link Id: 1289; Lane Connection: 3>2 |
Lane 3 of link 1265 connects to lane 2 of link 1289. |
|
RSTR2 |
Link Id: 1261; Lane Connection: 1>1, 2>2 |
Lane 1 of link 1265 connects to lane 1 of link 1261. Lane 2 of link 1265 connects to lane 2 of link 1261. |
|
RSTR3 |
Link Id: 1234; Lane Connection: 1>1 |
Lane 1 of link 1265 connects to lane 1 of link 1234. |
|
LINK_ID = 1289 |
||
|
Attribute |
Value |
Meaning |
|
LANE_CNT_F |
4 |
Link 1289 has four lanes when traveling from the reference node to the end node. |
|
LANE_CNT_R |
2 |
Link 1289 has two lanes when traveling from the end node to the reference node. |
|
RSTR1 |
Link Id: 1261; Lane Connection: 4>2 |
Lane 4 of link 1289 connects to lane 2 of link 1261. |
|
RSTR2 |
Link Id: 1234; Lane Connection: 4>2, 3>1 |
Lane 4 of link 1289 connects to lane 2 of link 1234. Lane 3 of link 1289 connects to lane 1 of link 1234. |
|
RSTR3 |
Link Id: 1265; Lane Connection: 1>1, 2>2 |
Lane 1 of link 1289 connects to lane 1 of link 1265. Lane 2 of link 1289 connects to lane 2 of link 1265. |
|
LINK_ID = 1261 |
||
|
Attribute |
Value |
Meaning |
|
LANE_CNT_F |
2 |
Link 1261 has two lanes when traveling from the reference node to the end node. |
|
LANE_CNT_R |
4 |
Link 1261 has four lanes when traveling from the end node to the reference node. |
|
RSTR1 |
Link Id: 1234; Lane Connection: 4>2 |
Lane 4 of link 1261 connects to lane 2 of link 1234. |
|
RSTR2 |
Link Id: 1265; Lane Connection: 3>3, 2>2 |
Lane 3 of link 1261 connects to lane 3 of link 1265. Lane 2 of link 1261 connects to lane 2 of link 1265. |
|
RSTR3 |
Link Id: 1289; Lane Connection: 1>1 |
Lane 1 of link 1261 connects to lane 1 of link 1289. |
© GARMIN