Lane signs indicate special regulations for one or more lanes of the roadway. The following can be cited:

S-51a. Lane reserved for specific types of vehicles. Indicates a lane designated exclusively for the circulation of one or more specific types of vehicles (buses, motorcycles, taxis, bicycles, etc.). The sign must include a pictogram representing the authorized vehicle type(s). In sections where the longitudinal road marking delimiting the lane consists of a broken line, other vehicles are permitted to use it only for maneuvers other than stopping, parking, changing direction, or overtaking, always giving priority to vehicles authorized to use that lane.

S-51b. Lane reserved for high-occupancy vehicles (HOV). Indicates one or more lanes designated exclusively for high-occupancy vehicles. The image will indicate the number of passengers considered high occupancy, which will be determined by the competent managing body in each case. If the lane(s) is reserved not only for HOV but also for one or more other specific types of vehicle, the corresponding images may be combined in the same way as for sign S-51a.

S-61c. Right fork on a roadway with two lanes in the proper direction and one lane in the opposite direction. On a two-way roadway with two lanes in the opposite direction, this indicates that a fork will occur with a change of direction in the right lane.

S-63a Fork in a four-lane roadway. Indicates, on a roadway with four lanes of traffic moving in the same direction, that a fork will occur, changing direction from two lanes to the left to two lanes to the right.

S-63b. Fork in a three-lane roadway. Indicates, on a roadway with three lanes of traffic moving in the same direction, that a fork will occur in the center lane, causing the resulting four lanes to merge, two to the left and two to the right.

S-63c. Two-lane fork to the left on a four-lane roadway. Indicates, on a roadway with four lanes of traffic moving in the same direction, that a fork will occur with a change in direction in the two left lanes.

S‐63d Two-lane fork to right on a four-lane roadway. Indicates, on a roadway with four lanes of traffic traveling in the same direction, that a fork will occur with a change in direction in the two right lanes.

S-64a Reserved and mandatory lane for cyclists adjacent to a one-way carriageway. On one-way carriageways, it indicates that cyclists must use the lane over which the sign is located and that other road users are prohibited from using it. The arrows indicate the number of lanes on the carriageway.

S-64b. Mandatory reserved lane for cyclists adjacent to a two-way roadway. On two-way roadways, it indicates that cyclists must use the lane where the sign is located and that other road users are prohibited from using it. The arrows indicate the number of lanes on the roadway and the direction of travel.

S-65a. Cycle lane attached to a one-way carriageway. On one-way carriageways, this sign indicates that the lane on which the sign is located is reserved for cyclists and that other road users are prohibited from using it. The arrows indicate the number of lanes on the carriageway.

S-65b. Cycle lane attached to a two-way roadway. On two-way roads, this sign indicates that the lane on which the sign is located is reserved for bicycles and that other road users are prohibited from using it. The arrows indicate the number of lanes on the roadway and the direction of travel.

S-66. Oncoming cycle lane. Indicates the presence of a mandatory cycle lane whose direction of travel is opposite to that of the adjacent lane.

S-68. Section of roadway with one lane for the own direction of traffic and two lanes for the opposite direction. On a two-way roadway, it indicates that a single lane is available, while the opposite direction has two lanes. The length of the roadway where this configuration is maintained shall be specified by a supplementary panel S-810.

S-70a. Lane merging on the left on a single-lane roadway. Indicates, on a roadway with one traffic lane, that a lane merging will occur on the left side.

S-70b. Right-hand merging on a single-lane roadway. Indicates, on a roadway with one traffic lane, that a lane will merge on the right side.

S‐71a. Lane merging on the left on a two-lane roadway. Indicates, on a roadway with two lanes of traffic moving in the same direction, that a lane will merge on the left side.

S‐71b. Lane merging on the right on a two-lane roadway. Indicates, on a roadway with two lanes of traffic moving in the same direction, that a lane will merge on the right side.

S-72a. Lane merging on the left on a three-lane roadway. Indicates, on a roadway with three lanes of traffic moving in the same direction, that a lane will merge on the left side.

S-72b. Lane merging on the right on a three-lane roadway. Indicates, on a roadway with three lanes of traffic moving in the same direction, that a lane will merge on the right side.

S-73a. Two lanes merging on the left on a two-lane roadway. Indicates, on a roadway with two lanes of traffic moving in the same direction, that two lanes will merge on the left side.

S-73b. Two lanes merging on the right on a two-lane roadway. Indicates, on a roadway with two lanes of traffic moving in the same direction, that two lanes will merge on the right side.