What was previously thought impossible, suspension bridges turning corners, it's now possible. Simply terminating the segments by placing two towers coupled together, then connecting a series or 3 cables, one in-between the two sets of towers and two of them to a third tower situated on the opposite corner, and then placing hanging wires suspended to the curved track below, this achieves a very stable support on three points of the track. the tower on the opposite corner is supported to 2 anchors on each side, this allows the trains to turn 90 degrees without the need for massive beams or expensive support structures.
This is similar and consistent to the way power rails are setup for trolley buses, a series of cables which create the right angle/curvature. Except that in this case, the support is much stronger.
With this layout, the track rests on 3 points, which is more than enough to provide the necessary support for the trains, even at full capacity. It is also important to note that the Degree of the turn doesn't have to be 90 Degrees, but anything less than that, this will accomodate almost all streets in most cities.
When it comes to security, the inventor has taken considerable time in foreseeing any emergency that any transportation system could face, from a Blackout to an earthquake, making this one of the safest means of transportation:
First and foremost, the driver's main function is mostly to open and close the doors and to be a first responder in case of an emergency, the actual movement of the cars will be controlled by a central computer, by having plenty of sensors to monitor its position/direction and status, many trains and subways are computer controlled, this greatly reduces the chance of an collision or an accident due to excessive speed. Also the computers will carefully monitor the position of all trains so that not two pass in-between towers at the same time, this is so that the span is not overload/strain, the "weakest" point on a suspension bridge is the middle of the span, and by not overloading it, it will remain at normal operational loads.
Another safety measure regards earthquakes, when the sensors detect one, the computers will immediately order the trains to stop at the nearest tower, this is because the towers are the strongest and safest places to be during an earthquake.
In the case of a Blackout or sudden loss of power, every car is equipped with a small battery, similar to those in trolley buses, which is enough to keep the trains moving for a few seconds, in this case the driver will move the train to the nearest tower forward or backward.
In order not to let the passengers stranded, every tower has an emergency staircase folding mechanism that will deploy manually or via RF or IR signal emmited from the car by the driver, this will deploy the "bridge" to safely link the tower to the cars. The driver will then open the doors connecting all the cars so that everybody can evacuate in a safe an orderly manner. This stairs will provide easy access to street level, and their cost should be minimum since it has very few parts.
In this image you can see the "bridge before being deployed and after, this bridge will only deploy by an encrypted signal from inside the car, to prevent it from deploying during normal operation.
With two ladders it would be very quick to evacuate all passengers to the street
However, taken into consideration the elderly and the disabled, a more accesible "winder" type stair can also be installed.
The last segment near the street is a drop-down ladder similar to those in fire escapes in some buildings.