As with any city it depends which road you are referring to
Brighton has a varying number of lanes on its roads, with some roads having two lanes in each direction and others having more or fewer lanes. The number of lanes typically depends on the size and traffic volume of the road.
The Paris ring road has usually three lanes in each direction. In some sections it has four lanes instead of three.
10
The Sydney Harbour Bridge carries eight lanes of vehicular traffic. There are also two train lines, a pedestrian footpath and a cycleway. The width of the bridge is almost 49 metres.
yes
yes
Some have odd, some have even but most have odd and even along different stretches!
The rubber strips are sensors that connect to traffic counters (the metal boxes). The counters record the number of axles that pass by a certain point on the road. Your local transportation agency uses the counts to figure out how many cars are using that particular road. The traffic counts tell the agency when to plan for road improvements and where to spend traffic funds.
Accumulated oil residue from the traffic flow during dry weather becomes wet and moves to the surface of the travelled lanes because oil is lighter than water. This makes the road surface extermely slippery.
Many head-on collisions may occur on two lane roads while passing, when there is oncoming traffic.
Pucca roads - roads paved with asphalt - are expensive to construct. They are constructed in areas with a lot of traffic. Many desert roads have little vehicle use so are not worth the expense and effort.
If you're asking in reference to America, the broken white lines are typically seen on any multiple lane road, highway, and freeway. These lines separate traffic lanes, going in a single direction on either side. It's okay to cross between lanes so long as the line is not solid, as many times as you like using proper signaling. Happy safe driving...